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.

[Q]: Article: Ever tried taking smart drugs to perform better in exams? They certainly work. Before last summer's exam, a few of my mates, merely out of curiosity, took a considerable amount of Modafinil, a drug normally used for narcolepsy . Guess what? While I was feeling sleepy, bored by revision, my mates were more focused. Modafinil is a smart drug that gives a user a feeling of staying awake for hours. It also sharpens the mind, improves memory and helps problem-solving. But it does more than just keeping you awake. It disturbs your mental system, making you desperate to do what you are doing. You just don't want to do anything else but revise all the time non-stop. A recent study discovers that healthy people use smart drugs, like Modafinil, to get down to and complete tasks they have been putting off, because these tasks seem more enjoyable when taking these drugs. This might sound like what a stressed student desires. However, the pills have a range of side-effects. "At present no evidence shows that these drugs are safe in healthy people," as a medical expert puts it, "Ordering online, though easy, is a dangerous way to obtain drugs. You never know what you're actually purchasing. " In my experience, Modafinil changes people's behaviour too. Over those weeks my friends became different people--in turn aggressive, cold. Even eating became "a waste of time" and so did conversation. A BBC survey found that of those who had tried smart drugs before, 92% would do so again. My friends say they'd happily do so without considering the practice a form of cheating. I admit I was curious--but not enough to try it. Seeing the strange behaviour of other users, I feel a little bit upset and scary. Modafinil may promise to change your grades, but it might also change the way you act. Don't say you haven't been warned!
Question: According to the author, his mates took Modafinil for the purpose of _ .
Options: (A) escaping from reality (B) getting better exam results (C) curing their narcolepsy (D) leading an active life
[A]: B

[Q]: Article: I am in my father's house in Connecticut, sitting at a crowded table with my brother, my two sisiters and all our partners, talking about a tree. "He doesn't want it cut down." My sister says when my father has gone to bed and none of us speaks of the tree in his presence. "He says he usef to climb it when he was a boy." When I was last here, a year and a half ago, for my father's 90th birthday, Hurricane Irene drove seawater into the roads. The large tree that hangs over the houses swayed alarmingly, but it stayed up. Last October, Hurricane Sandy acused a great deal of damage. Six months on, many of the surrounding houses are on sale, but the tree that hangs over the house still stands. "That tree," my brother says, "has survived the two worst storms of the last 100 years." Though my brother thinks highly of the amazing staying power of the tree, my sister says that the tree should never have been planted: it stops light from reaching the house. My other sister's partner says that all trees fall down eventually. There is plenty of evidence for what he says: throughout the neighborhood, the ramains of similarly sized trees lie on their sides, with their roots in the air. During this discussion, I offer to pay a quarter of whatever is required to remove the tree. "A guy I talked to," my brother says, "told me it could cost us$10,000." As night wears on, the discussion becomes increaslingly meaningless. There is no point in reaching any kind of agreement, since the decision is not for us to make. It's my father's tree, and he has refused to cut down the only thing in the neighborhood older than him.
Question: When does the discussion take place?
Options: (A) After lunch (B) After supper (C) At the weekend (D) Before their father's 90th birthday
[A]: B

[Q]: Article: The oil resources which are left will not last very long. This means that all vehicles such as cars, trains, buses, planes and ships that need oil to work will not be able to run. So it will be necessary to develop a new system of transport which uses a fuel more than oil. Electric vehicles are one possibility. In Britain, most families have at least one car and this car is used every day. It could be that only one person in the family drives the car to work or for shopping. The number of cars on the road which are almost empty perhaps helps to explain why the oil is used up so quickly. The family car is a very useful form of transport but it is also a great waste of energy, especially if it is compared with buses or trains. Much petrol is used by a car which is traveling at 120 kilometers an hour. Clearly, it would be better if there were fewer cars on the road and more speed limits so that the oil which is left will last as long as possible. About 25% of Britain's total consumption of energy is _ --it is used only in the home. Just over 20% is used for transport. Most of the energy is used in industry. It is difficult to suggest any possible energy conservation in industry because many of the suggestions would mean that some people would lose their jobs. It is important that industry produces the same amount of products using the same amount of workers. Obviously, conservation is not going to be the answer to the energy crisis . The most it can do is to give more time for a better solution to be found. The more time which is available for new sources of energy to be developed, the better it is because there is still a lot of work to be done in order to find suitable, safe methods of producing energy.
Question: In Britain, what reason could help to explain why oil is used up very quickly?
Options: (A) People use cars every day. (B) Most families have at least one car. (C) Many cars on the road are almost empty. (D) Electric vehicles are used.
[A]:
C