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.

Input: Consider Input: Article: When policy experts debate climate change solutions, they often talk about "a price on carbon." They are arguing about whether companies should pay when they put carbon pollution in the air. Proponents say that it's simple economics -- if it's free to pollute, you'll get a lot of pollution. Opponents claim it will raise the cost of energy that's produced from high carbon sources, like coal. But here's the secret that most people seem to be missing: There already is a price on carbon, and it's paid by the taxpayers. Carbon pollution, like every other form of pollution, has an impact on the environment. Throwing waste into a river will cause the fish to die and the people who drink the water to get sick. And when you produce carbon pollution, you get climate change -- sea level rise, stronger storms, severe droughts, damage to agriculture, and more. All of those impacts cost money. Insurance rates go up when storms get more destructive. Taxes increase when cities have to rebuild bridges and roads. Military budgets go up when droughts and population changes cause conflicts. Not to mention impacts on agriculture and health care costs. In other words, the price on carbon is what we all pay when there is no market force to limit the pollution that causes climate change. So the debate is really about who will pay that price -- the companies who are making a profit from the fossil fuels, or the taxpayers who pick up the cost now? Right now, we have private profit and public cost. It's just like if we allowed every business to throw its garbage in the street because it's too expensive to have it moved away properly. Does it add a little bit to your dinner check to require that restaurants dispose of their trash properly? Sure. But it would be more expensive for you if the city had to clean the streets of their garbage every day. So just like we put a "price on garbage" we need a "price on carbon pollution." Now, a "price on carbon pollution" can mean a lot of things. You could tax companies based on the amount of carbon pollution they produce, and return the money to taxpayers. You could put a limit on how much they can produce, thereby requiring them to invest in ways to conduct business in a less polluting way.
Question: What do the policy experts argue about carbon pollution?
Options: (A) Whether the companies should pay for it. (B) Whether taxpayers could get profit from it. (C) Who have the ability to change it. (D) How much should be paid for it.

Output: A

Input: Consider Input: Article: It is reasonable to say that every teenager can be affected by peer pressure at some point. Every day, in any high school, peer pressure has a major influence over the behavior of teenagers. It can be as subtle as being persuaded to be late for class or as extreme as a dangerous drug. Whether subtle or extreme, peer pressure can have damaging, sometimes life changing, and even serious results. "Teens don't often consider the long-term results that some behavior can cause," said Terri Price, a researcher. "Peer pressure can be very difficult to handle for many teens because of their fears of not fitting in". Peer pressure has always been part of teen life, but teens experience _ differently than their former generations did in the past. Sources of peer pressure have increased because of the Internet and other electronic communications. Recognizing peer pressure can be as simple as noticing that you have been asked to do something that you are not comfortable with. "Listen to your instinct , which is a sign for whether something is right or wrong. If it feels wrong, then most likely it is. "says Price. Teens are in a time of life when they are still discovering who they are. Many teens are influenced by peer pressure because of their insecurities . This can make them helpless especially when their self-control is weak or they lack healthy support, causing them to take risky behavior or turn to unhealthy support. Dealing with peer pressure is a topic of concern for teens. People can say, "Just say no," but the truth is that the statement is easier said than done.
Question: You can know whether a teen suffers peer pressure by watching _ .
Options: (A) whether he often surfs the Internet (B) whether he can get security (C) whether it is subtle or extreme (D) whether he feels comfortable with it

Output: D

Input: Consider Input: Article: One windy spring day, I observed young people having fun using the wind to fly their kites. Multicolored creations of varying shapes and sizes filled the skies like beautiful birds dashing and dancing in the exciting atmosphere above the earth. As the strong winds gusted against the kites, a string kept them in check. Instead of blowing away with the wind, they arose against it to achieve great heights. They shook and pulled, but the controlling string and the clumsy tail kept them in tow , facing upward and against the wind. As the kites struggled and trembled against the string, they seemed to say, "Let me go! Let me go! I want to be free!" They flew beautifully even as they fought the forced restriction of the string. Finally, one of the kites succeeded in breaking loose. "Free at last," it seemed to say. "Free to fly with the wind." Yet freedom from control simply put it at the mercy of an unsympathetic gentle wind. It flew ungracefully to the ground and landed in a twisted mass of weeds and string against a dead bush. "Free at last". Free to lie powerless in the dirt, to be blown helplessly along the ground, and to settle down lifeless against the first roadblock. How much like kites we sometimes are. There always exist misfortunes and restrictions, rules to follow from which we can grow and gain strength. Prohibition is a necessary counterpart to the winds of opposition. Some of us pulled at the rules so hard that we never fly fast to reach the heights we might have obtained. If we keep all the commandment , we will never rise high enough to get our tails off the ground. Let us each rise to the great heights, recognizing that some of the prohibitions are actually the steady force that helps us climb and achieve.
Question: In the passage the writer watched _ .
Options: (A) many young people enjoying the sunny day (B) many birds dashing and dancing in the sky (C) many young people flying multicolored kites (D) the strong winds blowing against the sky
Output: C