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: Dear Textual Healing, I would be very interested in your recommendations for any books to help me through a difficult time of my life. At 57, I am feeling a bit lost. I have a wonderful, loving husband and bright, caring teenage daughter but I am lonely and have lost my spark for life. I have always taken care of everyone and managed a career, but, after the death of my father this summer, my difficulties as a child in a terribly abnormal family have come back to me regularly. I have become unfocused and often alone while my husband is away frequently on business and my daughter busy with school and friends. I am seeking the help of a therapist and taking care of myself but I would love to read something to help me "get my groove back" and reengage with life. PC Dear PC, From the letter you've given us about your life, it's no wonder you're feeling a little lost. But before prescribing titles to help you get your groove back, I'd recommend taking a journey into Rebecca Solnit's non-fiction book,A Field Guide to Getting Lost, which is packed with the wisdom of everyone from Pat Barker to Thoreau and Keats. The word lost is rooted in the Old Norse "los", meaning the disbanding of an army. "This origin suggests soldiers falling out of formation to go home, ceasing fighting with the wide world. I worry now that many people never disband their armies, never go beyond what they know," Solnit writes. So instead of fearing that lost feeling, try seeing its potential for discovery. Explorers, remember, are always lost simply because they're forever someplace new. "Leave the door open for the unknown, the door into the dark," Solnit advises. "That's where the most important things come from, where you yourself came from, and where you will go." For something that asks a little less of the reader while still giving plenty in return, try a dose (--) of Anne Tyler, the beloved creator of numerous heroes whose serious conditions will move anyone who finds themselves in a midlife difficult situation. One such character is 53-year-old Rebecca Davitch, the heroine ofBack When We Were Grownups. Like you, she's combined marriage and motherhood with a career but suddenly finds herself feeling lonely in her own home. Could it be, she wonders, that she's "turned into the wrong person"? Don't be fooled by the way this novel ambles along -- as Rebecca revisits youthful ambitions and the college boyfriend she abandoned, it asks some heart-rending questions before arriving at a place of graceful, joyous acceptance. Along similar lines, I'm also going to recommendThe Unlikely Pilgrimage of Harold Fryby Rachel Joyce. Its hero is 65 when he learns that a former colleague sick. On his way to post her a note,he decides instead to visit her -- on foot, from his home in deepest Devon to England's northernmost town, more than 600 miles away. You don't manage that without focus! It's a journey to a holy place that will take him 87 days to complete, during which he considers his childhood, marriage and relationship with his son, and becomes an accidental media sensation . By the time he reaches his destination, you'll feel anything but tired. Finally, Ruth Ozeki's novelA Tale for the Time Beingwill charm the missing spark back into your life. Combining the diary of a sad Tokyo teenager with the story of the middle-aged novelist who finds it, washed ashore on a remote island off the coast of British Columbia, it's a beautiful illustration of how our lives touch -- and are touched by -- others in ways we mightn't even be aware of. This "Man Booker Prize" finalist has plenty to teach about Zen Buddhism, and unless you happen to live in one of its settings, it provides a bracing change of scene, too. One other suggestion: books, as we all know, make great companions but that doesn't mean they can't be enjoyed in the company of others. If you find yourself home alone, why not slip one into your back pack and head out to a favourite cafe.
Question: What has mainly led to PC's negative attitude to life?
Options: (A) The lack of helpful books. (B) The blow of her father's death. (C) The contrast between her devotion to others and her being ignored. (D) The contrast between her easy life and her family members busy life.
Example Output: C

Example Input: Article: Ocean Park If you love the sea, Ocean Park is the place for you! Situated on the south side of Hong Kong Island, this 870,000 square metre educational theme park provides many opportunities to learn about marine life. To start with, the park boasts the Atoll Reef, one of the world's largest aquariums, with about 2,500 fish from nearly 300 different species. What makes this aquarium special, however, is not just its size, but also its design. The Atoll Reef is built with an observation passageway that circles the aquarium on four different levels. This lets visitors view sea life from a variety of depths and angles. Then there's the Shark Aquarium, a tank with more than 200 sharks from more than 30 species. Like the Atoll Reef, this unique aquarium is designed to make sure guests get the most out of their visit. Shaped like an underwater tunnel, guests can watch as sharks swim overhead and dive at them from every side. There's also the Sea Jelly Spectacular, an aquarium that houses more than 1,000 jellyfish of all shapes, colours and sizes. And at the park's Dolphin University, visitors can go on educational tours and watch the training of dolphins up close. The park's most popular attraction is the Ocean Theatre, a huge outdoor pool where dolphins and sea lions entertain the visitors. Sometimes a killer whale even takes part in the performance! Although Ocean Parks focus is on the water, the theme park has plenty of other activities, too. For people seeking excitement, there are rides like the Abyss Turbo Drop, a roller coaster ride that takes passengers on a 20-storey drop straight down. There are also exhibits like the Dinosaur Discovery Trail and Bird Paradise. Finally, no trip to Ocean Park would be complete without visiting the park's most popular animals--four giant pandas that were given as a gift from China's central government.
Question: Hong Kong Ocean Park is called an educational theme Park because _ .
Options: (A) it offers chances for visitors to enlarge their knowledge of sea life. (B) it provides chances for people to broaden their knowledge of science. (C) it is specially designed to attract the young who are interested in the sea. (D) it has a lot of activities for people to have fun.
Example Output: A

Example Input: Article: Christmas is perhaps the most important holiday in American culture. On Christmas Eve, children sit out with parents in the living room hanging stockings, setting up a Christmas tree, eating candy canes, and setting up milk and cookies for Santa Claus. Perhaps the most beloved figure in American history, Santa Claus has become an important icon for Christmas. I remember believing in Santa when I was a very young girl. However, as I grew older, I learned many facts that "proved" his existence as false. Always inquisitive by nature and very keen on the scientific method of experimentation, I was determined to use tests and observations to determine whether Santa Claus was real. The first year of tests happened when I was 5. I decided that if I stayed up all night on Christmas Eve, I could see if Santa really did come down the chimney. However, that was a _ attempt, I fell asleep that year. The next year, I was able to test if location was an issue with Santa's deliveries. That year, my family spent Christmas with the family of one of my mother's friends. At the time, I decided that if Santa was all-knowing he would know I wasn't home. Sure enough, there was a pretty pink package waiting for me the next morning. At age 7, I came up with my ultimate test to see if Santa was real. That year, I didn't send out my Christmas letter to Santa. On Christmas Eve, my mother dragged me to our local Wal-Mart and led me around the toy section. I refused to say a word, but did let my eye linger on a ballet set. I figured that "Santa" wouldn't know what to get me because he shouldn't be able to read my mind. However, mother would know everything that caught my eye in the store. If I got the ballet set the next morning, I would have my evidence. Christmas morning, there was the ballet set, sitting under the tree. As I didn't use it much, mother ended up returning it a few days later. She claimed Santa was generous enough to leave a receipt. That was the end to my mission to discover the existence of Santa. Now, I can look back on all of these with fond nostalgia . The magic and mystery of it all made Christmas a fun time. Santa was a big part of my childhood.
Question: How did the writer prove the existence of Santa Claus as false?
Options: (A) He stayed up all night on Christmas Eve and saw Santa come down the chimney. (B) He found that Santa was all-knowing and could make the deliveries accurate (C) He didn't send out his Christmas letter but still got his Christmas present (D) He used the receipt left by Santa to return his present
Example Output:
A