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.

Ex Input:
Article: There exist cruel wars, fighting and sadness in the world today, so it's not only necessary, but also essential to have a good sense of humor just to help us go through difficult times in our lives. Putting a smile on someone's face when you know they are feeling depressed, as the saying goes, makes me feel good and warms my heart. How would you feel if you could not joke around with your wife, husband, child, co-worker neighbor, close friend, or even just someone that you are standing in line with at your corner store? I am always saying things that make others smile or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is a common manner to speak to others that are around you. I know of a few people that don't have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their face. They don't get the joke that makes others laugh. I am busting a gut while they just sit there, looking at me as if I were from outer space. How can people not get a really funny joke? Laughing is essential to keep your stress levels under control. Without humor we would find ourselves with a lot of psychological problems, or on a lot of medications to keep us from going crazy. There is too much sadness in this present world. It drives people crazy. We all need to find a way to avoid the sadness and bring a little light into our lives. Therefore, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.
Question: According to the author, humor is useful in the aspect that _ .
Options: (A) it can pick up people's spirits (B) it can help people get on well with others (C) it can help get rid of the cruelty in the world (D) it makes people more confident

Ex Output:
A

Ex Input:
Article: A couple who held hands at breakfast every morning even after 70 years of marriage have died 15 hours apart. Helen Felumlee, died at 92 on April 12. Her husband, 91-year-old Kenneth Felumlee, died the next morning. The couple's eight children say the two had been inseparable since meeting as teenagers, once sharing the bottom of a bunk bed on a ferry rather than sleeping on night apart. They remained deeply in love until the very end, even eating breakfast together while holding hands, said their daughter, Linda Cody. "We knew when one went, the other was going to go," she said. According to Cody, about 12 hours after Helen died, Kenneth looked at his children and said, "Mon's dead." He quickly began to fade, surrounded by 24 of his closest family members and friends when he died the next morning. "He was ready," Cody said, "He just didn't want to leave her here by herself." Son Dick said his parents died of old age, surrounded by family. The pair had known each other for several years when they eloped in Newport across the Ohio River from Cincinnati, on Feb. 20, 1994. At two days shy of his 21stbirthday, Kenneth-who went by Kenny-was too young to marry in Ohio. "He couldn't wait.' son Jim said. Kenneth worked as a railroad car inspector and mechanic before becoming a mail carrier for the Post Office. He was active in the church as a Sunday teacher. Helen stayed at home, not only cooking and cleaning for her own family but also for other families in need in the area. She taught Sunday school, too, but was known more for her greeting card ministry, sending cards for birthdays, sympathy and the holidays to everyone in her community, each with a personal note inside. "She kept Hallmark in business," daughter-in-law Debbie joked. When Kenneth retired in 1983 and the children began to leave the house, the Felumlees began to explore their love of travel, visiting almost all 50 states by bus. "He didn't want to fly anywhere because you couldn't see anything as you were going," Jim said. Although both experienced declining health in recent years, Cody said, each tried to stay strong for the other. "That's what kept them going," she said.
Question: From what Cody said, we can learn the children _ .
Options: (A) were not in front of their father (B) don't look after their father (C) foresaw their father would go (D) surrounded their father

Ex Output:
C

Ex Input:
Article: Robots industry is developing so rapidly that there is no denying that we may one day find ourselves surrounded by robots. The humanoid (human like) robots with two legs such as Honda Motor Co. Ltd's ASIMO would likely have an easier time climbing up stairs inside homes than a robot that moves on wheels, developers say. But it will be some time before such devices make their way into people's homes. "They may look smart, but they are still quite stupid," Shimoyama said. "I don't think they will ever be as smart as humans." While safety is an obvious concern, robots also need to be sensitive to people's needs. Researchers at Fujitsu Frontech Ltd and Fujitsu Laboratories responsible for developing "Enon", a guide and patrol robot designed for use in shopping malls and corporate facilities , are working on this. Enon, which has a humanoid upper body but no legs, is equipped with a touch screen on its chest and space in its stomach to carry loads weighting up to 10 kg. In guide mode, it will check a newcomer and approach the person with a nod and a greeting: "Are you a visitor? Hello." Visitors requiring directions can point to icons displayed on Enon's chest screen. If the restroom icon is pressed, the screen will display a map that shows the way. The robot will then face and point in the direction of the restroom, although it won't actually walk the visitor there. Enon is now in use at four locations in Japan, including a shopping mall near Tokyo. The main goal is to make it more helpful for the elderly. "People who work in the transportation sector often ask whether we can build a robot that will find elderly people who look lost in train stations, and ask them if they are all right," said Toshihido Marita, director of Fujitsu Laboratories Ltd's autonomous system laboratory. "Actually that is hard to do, very hard," he said.
Question: The advantage of Honda Motor Co. Ltd's ASIMO is that _ .
Options: (A) it can do any housework for us (B) it can talk with patients or old people (C) it can climb up stairs as humans (D) it can walk smoothly with its wheels

Ex Output:
C