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: 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
Example Output: A

Example Input: Article: Do you enjoy seeing the stars twinkling at night ? Or do you love the ocean and sea, diving and racing with lovely dolphins? With heavy burdens on their shoulders, teenagers find it hard to pull out. Even if they are free, they prefer to occupy themselves with computer games or watching TV. How to get children away from screens is a great concern for parents. Now there is some good news for those concerned parents and teachers. A campaign is being launched to encourage children to surrender 30 minutes of screen time a day to head for the great outdoors. The newly formed Wild Network - a collaboration of nearly 400 organizations - is attempting to attract youngsters away from television and computer screen and into fields, woods and parks. Organizers say it is the UK's biggest ever campaign to reconnect children with nature and outdoor play, and claim it could help improve fitness, mental alertness and general well-being. A documentary film, Project Wild Thing, will herald the launch at more than 50 cinemas across the UK from Friday. It looks at the increasingly fragile link between children and nature. Members of the network include the National Trust, RSPB, Play England and the NHS sustainable development unit. Andy Simpson, chairman of the Wild Network, said: "The tragic truth is that kids have lost touch with nature and the outdoors in just one generation. Time spent outdoors is down, roaming ranges have fallen drastically, activity levels are declining and the ability to identify common species has been lost." Suggestions of how to get more time in nature include collecting conkers , camping or snail racing, and observing autumn colour on trees. From January, the network will aim to make suggestions to politicians on how government can do more _ This is not the first time the message of less screen, more play has been brought up. Children in the 1980s were entreated to do the same by the BBC TV series Why Don't You, which somewhat confusingly called on its viewers to "switch off your TV set, and go do something less boring instead".
Question: What is the main purpose of the campaign in UK?
Options: (A) To save 30 minutes for watching TV programme each day. (B) To encourage children to play outdoors. (C) To see the documentary film, Project Wild Thing. (D) To teach students how to learn more efficiently in schools.
Example Output: B

Example Input: Article: It is well known that Einstein was the father of the famous Theory of Relativity. But do you know it owes a great deal to Marits, Einstein's former wife? In 1896, 17-year-old Einstein went to Zurich to study physics. There he met a girl from Hungary. They studied in the same class. The same interest brought the two together and the young man fell in love with Marits. In 1903, when Einstein was 24 years old, he married Marits, who was 4 years older than he. After their marriage, Einstein devoted himself to the research of the great theory. To give her husband more help, Marits gave up her own work, and became a good wife and assistant. She tried her best to encourage him whenever possible and she was sure that her husband would succeed. They often discussed the theory while walking outside or sitting together in the room. They even discussed it in their letters when one of them was away from home. In 1914, the Einstein moved to Berlin and settled there. At that time, Einstein's theory proved to be correct and he had become famous all over the world. Marits was very proud of him and his success. But it was not long before the First World War broke out. Marits as well as her two sons, who were all on holidays in Switzerland, couldn't come back to Berlin. The war not only stopped Einstein's work but broke up the warm, happy family. In 1919, Einstein and Marits had to get divorced. Einstein himself, however, later said that Marits was really an outstanding woman.
Question: Einstein fell in love with Marits mainly because they _ .
Options: (A) were in the same school (B) wanted to do research together (C) had the same interest (D) came from different countries
Example Output:
C