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: For new countries joining the European Union, and older ones getting used to their dark red passports, becoming "Europeans" is a bit like marrying into a large, eccentric family. Europeans have a lot in common but it is their differences, not their similarities, that attract the attention of sociologists and market researchers, and are more interesting. * 35% of Germans live alone, but only 9% of Spaniards. Perhaps this explains why Spaniards lead Europe in the habit of going out for a drink. * The British attend more adult evening classes than anyone else in Europe, and the Belgians least. So it can't just be the dark evenings. There are no figures on how many Britons go for a drink afterwards. If there were, they might be up at the top with Spain! * The British think black cats are lucky. Every other European country regards them unlucky. * The Dutch and Germans are the greatest caravaners , but the Germans like bigger beds in their caravans. * The French are the most athletic Europeans. Next come the Dutch. But the Belgians, just over the border, play fewest sports. * The Germans spend twice as much on heating as the Spaniards. Well, of course they do, it's colder. * Dutch husbands do the household shopping a lot more often than Italians or Spaniards. * The French are the champion public transport commuters of Europe. If you hate commuting, go and live in the Netherlands, where journeys to work are shorter than anywhere else. * The amount of direct eye-contact between strangers is three times greater among Spaniards than it is among the British or Swedes. Sharing a lift is torture for both the British and the Swedish. * No European countries really agree with any other about how to make good coffee. All of them are different. There are exceptions to all these rules. Deal with them in the spirit of my 8-year-old daughter. "If you don't understand each other's language, you just laugh a lot, and eat, and point at things."
Question: We can know from the passage that _ .
Options: (A) sociologists are most interested in the idea of the European Union (B) all the European countries are not willing to join the European Union (C) Europeans have a lot more differences than similarities (D) trade opportunities exist in the cultural differences in the European Union

Ex Output:
A

Ex Input:
Article: To most of us,school means classes,teachers,schedules,grades,and tests.But for the children at Sudbury Valley School in Massachusetts,school is very different. Firstly,there are no lessons.All the children,aged between 4 and 19,do whatever they want.There are no teachers--only "staff members".The idea behind this is that you do not need to make children learn,because children want to learn anyway."You do not need to say to a three yearold,'Go explore your environment.'You can't stop them!" says Daniel Greenberg,a founder of the school."But if you make children do what you want all day,they will lose all taste for learning." At Sudbury Valley School,you will permit children to talk,read,paint,cook,work on computers,study French,play the piano,climb trees or just run around.Two boys spent three years just fishing! The other way that Sudbury Valley School is different is that the children can decide the rules.Every week,there is a school meeting where both children and staff have one vote each--even the fouryearolds.They decide the school rules,how to spend the school budget,and even which staff they want and do not want any more. When the school first opened in 1968,people said it would never work.But today,the school has 200 students,and 80%of its students go on to college. Even the two boys who went fishing all the time have successful careers today.One of them is a musician and the other is a computer scientist.
Question: What is the main topic of the article?
Options: (A) An unusual school. (B) Children's hobbies. (C) A school without rules. (D) Education in the US.

Ex Output:
A

Ex Input:
Article: Efforts to reduce the damage from the huge oil spill in the Gulf of Mexico are under way . How can you help ?A number of organizations are recruiting volunteers. The Deep Water Horizon response team is looking for help in identifying shoreline and animals affected . Oiled wildlife should not be captured but instead reported at 1-866-557-1401. To report areas with oil ashore or to leave contact information to volunteers in the affected areas , call 1-866-448-5816. The National Wildlife Federation is looking for volunteers and support to help spot distressed or oiled wildlife , and to assist in the cleanup and restoration efforts along the coast of Louisiana. You can text the word "NWF" to 20222. That'ss donate $10 to the National Wildlife Federation through your phone bill. United Way has launched the Gulf Recovery Fund . which is providing emergency assistance and long-term recovery support for the communities affected by this oil spill . Those who need help or want to volunteer can dial 2-1-1.You can donate to this fund by going to liveunited . org/gulfrecovery.or text the word "United" to 50555 to donate $10 from your mobile phone. The First Response Team of America is working with the National Guard in Southern Louisiana to build dams to hold back the oil from the fragile coastal habitats . Their founder , Tad Agoglia --who was named a CNN Hero in 2008--has made their work on the oil . spill their top Priority until the disaster is contained.They are looking for volunteers . Call 941-388-3010. AmenCares is providing medical care and supplies to oilspill victims along the Gulf , and is funding and assisting mental health assessments and counseling needs for the immediate and long-term health and mental health issues affecting children as a result of this disaster . Mental health experts are in great demand . The Children's Health Fund can be reached at 1-800-535-7418.
Question: If you see an oiled bird in the Gulf of Mexico . you are supposed to _ .
Options: (A) catch it (B) raise it at home (C) call 1-866-557-1401 (D) shoot at it

Ex Output:
C