In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.

Example Input: Article: One of my China Dialogue colleagues in Beijing recently bought a Philips energy-saving light bulb to replace a standard one.He was happy with his choice.It may have cost 30 yuan (just under US$4.50) - ten times the price of a filament bulb - but he wanted to save energy as part of his low-carbon lifestyle.And according to the shopkeeper, he would save, in the long run, much more than the 30 yuan he was spending. Yet only one month later, his expensive light bulb blew up, before he had saved even a small part of the purchase price.Will he stick to his high-cost, low-carbon lifestyle? China's environmental organizations have started to advocate low-carbon lifestyles and the decrease of carbon footprints to help fight against climate change.But they have overlooked one fact: in China, low-carbon living comes at a high cost.It means buying energy-saving bulbs and appliances, and environmentally friendly building materials and daily goods.Cost can no longer be the only standard for purchases.An energy-saving and environmentally friendly product is more expensive than a standard alternative - whether it's a simple light bulb or the house it shines.For average consumers, even buying an ordinary bulb is a huge burden.How can we persuade ordinary people to choose an energy-saving residence? This is not a trend they can afford to follow; perhaps this fashion is only for the rich. Most consumers today do not cause huge carbon dioxide (CO2) emissions.Their responsibility lies not in choosing a low-carbon lifestyle today, but in avoiding a high-carbon life in the future.The principle of "common but differentiated responsibility" - a basis of sustainable development - can be applied here as well. In China, low-carbon living still is resisted by a lack of social infrastructure . Even if your salary allows you to make that choice, nobody is there to help you accomplish it. Consider energy-saving homes. You need to find out whether or not the developer has used natural materials wherever possible; how effective the insulation(, ) is; and what the green credentials of installed equipment are.You can read up a little, but you'll still be lucky to avoid being puzzled by the developers' marketing.Many so-called energy-saving buildings are nothing of the sort, and some are even more energy-hungry than the average home - as Li Taige warned in his article "Energy-efficient buildings? Not always", on China Dialogue last August.
Question: What may probably be the best title of this passage?
Options: (A) To purchase a cheap bulb - your wise alternative. (B) To choose an energy-saving residence - a must of your life (C) To learn a low-carbon lifestyle - each citizen's responsibility (D) To learn a low-carbon lifestyle - a promising but difficult purpose
Example Output: D

Example Input: Article: Mrs. Bertha Flowers was the aristocrat of Black Stamps. She had the grace of control to appear warm in the coldest weather, and on the Arkansas summer days it seemed she had a private breeze which swirled around, cooling her. One summer afternoon, she stopped at the store to buy supplies. Another Negro woman of her health and age would have been expected to carry the paper sacks home in one hand, but Momma said, "Sister Flowers, I'll send Bailey up to your house with these things." "Thank you, Mrs. Henderson. I'd prefer Marguerite, though." My name sounded so beautiful when she said it. "I've been meaning to talk to her, anyway." They gave each other age group looks. There was a little path beside the rocky road, and Mrs. Flowers walked in front swinging her arms and picking her way over the stones. Without turning her head, she spoke to me, "I hear you're working very good school work, Marguerite, but that it's all written. The teachers report that they have trouble getting you to talk in class." We passed the triangular farm on our left and the path widened to allow us to walk together. "Now no one is going to make you talk--possibly no one can. But bear in mind, language is man's way of communicating with his fellow man and it is language alone which separates him from the lower animals." That was a totally new idea to me, and I would need time to think about it. "Your grandmother says you read a lot. Every chance you get. That's good, but not good enough. _ " She said she was going to give me some books and that I not only must read them, I must read them aloud. She suggested that I try to make a sentence sound in as many different ways as possible. "I'll accept no excuse if you return a book to me that has been badly handled." My imagination boggled at the punishment I would deserve if in fact I did abuse a book of Mrs. Flowers'. The odors in the house surprised me. The sweet scent of vanilla had met us as she opened the door. "Have a seat, Marguerite. You see, I had planned to invite you for cookies and lemonade so we could have this little chat." She carried a plate covered with a tea towel. As I ate she began the first of what we later called "My lesson in living." She said that I must always be intolerant of ignorance but understanding of illiteracy. That some people, unable to go to school, were more educated and even more intelligent than college professors. She encouraged me to listen carefully to what country people called mother wit. That in those homely sayings was couched the collective wisdom of generations. When I finished the cookies she brought a thick, small book from the bookcase. I had read A Tale of Two Cities and found it up to my standards as a romantic novel. She opened the first page and I heard poetry for the first time in my life. "It was the best of times and worst of times..." Her voice slid in and curved down through and over the words. She was nearly singing. I wanted to look at the pages. Were they the same that I had read? Or were there notes, music, lined on the pages? Her sounds began cascading gently. I knew that she was nearing the end of her reading. "How do you like that?" It occurred to me that she expected a response. The sweet vanilla flavor was still on my tongue and her reading was a magic to my ears. I had to speak. I said, "Yes, ma'am." It was the least I could do, but it was the most also. "There's one more thing. Take this book of poems and memorize one for me. Next time you pay me a visit, I want to recite." I have often tried hard to search for the enchantment I so easily found in those gifts. To be allowed, no, invited, into the private lives of strangers, to share their joys and fears, was a chance to exchange the Southern bitter wormwood for a cup of mead with Beowulf or a hot cup of tea and milk with Oliver Twist. When I said aloud, "It is a far, far better thing than anything I have ever done..." tears of love filled my eyes at my selflessness. I was liked, and what a difference it made, I was respected not as Mr Henderson's grandchild or Bailey's sister but for just being Marguerite Johnson.
Question: Marguerite's opinion of A Tale of Two Cities before and after Mrs. Flowers' reading can be described as _ .
Options: (A) poetic ... musical (B) satisfactory ... informative (C) romantic ... dramatic (D) common ... extraordinary
Example Output: D

Example Input: Article: A black and white kitten with a broken back lay on animal doctor Betsy Kennon's examination table. A regular customer had rushed him to her office after his pet dog brought the cat home in his mouth. The dog's owner was horrified, believing that his pet had caused the cat's injuries. But Kennon found no teeth marks or bite wounds, which showed that the dog had probably saved, not harmed, the kitten. In Kennon's opinion, however, the cat was a hopeless case. Many doctors would have _ such a badly hurt animal. But she couldn't be so cruel. The kitten's bright eyes and sad face had won her over. There was no way of finding his owner, so Kennon, a single woman aged 56, decided to keep him. She gave him a round of shots and fed him food mixed with medicines. He couldn't move his back legs but soon started pulling himself forward with his front legs. The doctor named him Scooter and contacted a company that makes carts for disabled animals. Scooter took to his new wheels like a natural. In no time he was able to move freely, but somewhat awkwardly, around Kennon's office, home and even her backyard. The sight of the determined Scooter was uplifting and amusing in equal measure and Kennon had to smile each time the cat entered the room. Kennon was convinced that her kitten could share his high spirits with others. So she took Scooter to the local hospital to see if he could help the patients. His first patient was an elderly woman who'd had a stroke and hadn't spoken to anyone for two days. Scooter jumped out of Kennon's arms and onto the bed, rolled over to the patient, and lay gently near her cheek, purring softly. The woman looked at Scooter. "Kitty," she murmured as she began to talk to him. Amazed, Kennon turned to the doctor --- and saw that she was in tears. The cat had engineered a small miracle. Today Scooter spends about ten hours a month working with patients who are recovering from strokes and injuries. Again and again, Kennon watches as her cat provides hope and comfort. As one patient who'd lost her leg in a car accident said, "If he can do it, so can I."
Question: Why did Kennon decide to keep the cat?
Options: (A) She wanted a companion. (B) The cat's owner abandoned him. (C) The cat was hopeless. (D) She liked the cat.
Example Output:
D