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: How often do you change your hairstyle or ask for new dresses? You may try to follow trends in Western countries,but your peers in the United States don't care as much about fashion as you do. A recent survey among high school students in China,Japan,South Korea and the US found that Asian teenagers care more about their looks than young people in the US. This survey was held in 156 high schools in the four countries. More than 7,000 teenagers were questioned about their view on life and the world. South Koreans, at 83 percent, cared most about their appearance. They were followed by the Chinese and Japanese while US students showed the least interest in fashion at only 33 percent. "The different results show differences of cultural background," said Sun Yunxiao from the China Youth and Children Research Centre. He explained that in the US there are many different _ of beauty, so teens are more likely to be confident about their appearance. US teenagers' high self-confidence is showed in survey. About 85 percent are happy with themselves. The percentage of self-confident Chinese students stands at only 30 percent. Strong ambition( ) is seen in Chinese high schools. Only two in five high school students are satisfied with "an average living". Koreans are next at 48 percent,Japanese come in at 66 percent and Americans are at 71. "According to the survey,Chinese students are happy. But Chinese students need to be more independent and learn how to relax."said Sun.
Question: According to the survey, _ cared little about their appearance.
Options: (A) the Chinese teenagers (B) the American teenagers. (C) the Korean teenagers (D) the Japanese teenagers

Output: B

Input: Consider Input: Article: Reading books has long been a way to relax.However,in this modern age of computers,the Internet,DVD movies and MP3 players,the simple act of reading a book has taken a back seat.People want something more interactive than just pages to turn.We seem to be turning away from the joy of reading a good book,but there is an answer. Audio books have been around for a long time.But most people think that audio books are just for people with eyesight problems.This is one of their uses,of course,but it is far from the full story. Audio books are in the form of either cassette tapes or CDs.The beauty of them is that the whole story is read often by well-known actors and actresses.It is like having your own play.There are many kinds of audio books,so you are sure to find one that suits your tastes.The really good thing of listening to an audio book is that you can listen to it wherever you want to. Audio books do not just tell stories--they also provide language lessons.Imagine learning to speak a number of key Japanese phrases while you do the ironing,or learning basic French while doing the housework.Audio books can be found in most big bookstores,as well as over the Internet.There are books for people of all ages,including kids.If you are a member of a local library,you will also find audio books to borrow,so you can try one and decide if you really want to buy one.
Question: In the writer's opinion,which of the following is a really good thing of audio books?
Options: (A) They can be found in most big bookstores. (B) They are much cheaper than printed books. (C) They can be listened to anywhere you like. (D) They can be borrowed from libraries.

Output: C

Input: Consider Input: Article: Hybrid cars are cars that run on petrol and electricity. They have a small standard petrol engine and a battery electric motor to provide electric power. There are some differences between different models of hybrid cars, but the general principle is that the car runs on petrol, and the electric motor kicks in when additional power is required, for example, when going uphill or accelerating. In some hybrid cars the petrol engine turns itself off when not needed, for example when the car has stopped at traffic light, keeping only the electric engine running. Conventional cars have large engines to deal with driving uphill and accelerating. Hybrid cars have much smaller petrol engines, improved by electric motors when needed, so they use less petrol. Another way that fuel consumption is cut is by a system of "regenerative braking". The electric motor is used to slow down the car, rather than conventional brakes. The energy produced by slowing the car is changed into electrical power, which is automatically stored in the battery. In effect, the battery recharges when you brake. In conventional cars the energy produced when braking is wasted. In 1928 Ferdinand Porsche built an experimental hybrid car. The first mass-produced hybrid car, the Toyota Prius, came out in Japan at the end of 1997. However, hybrid cars became available in the USA only in 1999. As they use less fuel, hybrid cars are cheaper to run. There are also many voices in place to encourage people to buy them. In some countries, hybrid car owners pay a lower rate of tax, and don't have to pay on certain roads. In some cities, hybrid cars are allowed to park for free.
Question: Hybrid cars consume less energy than conventional cars because hybrid cars _ .
Options: (A) have large engines to deal with accelerating (B) have conventional brakes to slow down the car (C) have electric power to assist when needed (D) have no energy consumption when stopping
Output: C