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: Most middle school students find it boring to learn math. But students in Yet Sen Middle School in New York, US, don't think so. Why? Because they are in the school of One Program, which asks students to work on their own or in small groups on computers to have math lessons. "The program gives the students a new learning style. No traditional classroom can compare with it. We give each lesson according to the students' interest and their strong and weak points, "said Joel. Klein, the school's headteacher, "We're looking for a new way that interests students. " Students enjoy these math lessons, especially lessons with video games. They must find out the answers to math problems to get through the game. One such game is Dimension M. As students move through mazes with their keyboards, some questions come up. Caleb Deng had to answer the question: What is 5+(6x3)? He _ on paper quickly because there was just a minute left to play. "I was right, "said Deng, 14, as he ended the game with a high score . "This really makes math lessons more exciting, since we are fighting to learn better. "
Question: Students in Yet Sen Middle School like math because _ .
Options: (A) they work in large groups (B) they can work on computer (C) the teachers are interesting (D) math questions are easy there
Example Output: B

Example Input: Article: Shopping in the United States changes a lot.About ninety years ago most people shopped in small stores that were owned by one person or a family.Women went from the bakery to the butcher's to the grocer and on to the fruit and vegetable seller in order to get their food for the week. Then about sixty years ago, supermarkets were born.In a supermarket, people could get all the different kinds of food they needed without going to different stores. The next big change in shopping in the United States was the shopping mall.A shopping mall is a group of stores under one roof.Because malls allowed people to shop without worrying about the weather, they soon became very popular.The mall became a place for people to socialize in addition to shopping.If you walk through a mall, you will see older people sitting, chatting and drinking coffee.Malls are places for teenagers to hang out.Many teens will often just "go to the mall" and spend time with their friends. The recent change in American shopping was the superstore.Large chain stores such as Wal-Mart, Office Depot and Toys "R" Us have been built all across the United States.Because they are so large, they can buy goods at a great discount and sell them much cheaper than smaller stores. Sometimes, when they are built near small towns, many of the small town stores have to close.They just cannot compete with their giant neighbors. And now, online shopping is becoming more and more popular all over the States.People are too busy to go to the physical stores, so they go shopping over the Internet.Online shopping has lots of advantages.For instance, online stores are usually available 24 hours a day.Searching or browsing online shops can be faster than browsing the physical stores.While, online shopping also has its disadvantages.People are at higher risk of being cheated on the part of the merchant than in a physical store.And privacy of personal information may be let out.
Question: Which is the place for people to spend time with others according to the passage?
Options: (A) Shopping malls (B) Small stores (C) Supermarkets (D) Superstores
Example Output: A

Example Input: Article: Welcome to Coteborg University Coteborg University is one of Sweden's largest and most popular universities. We are very proud of this and believe that there are several reasons for our popularity. The principal reasons we believe to be the high quality of our education and research and the broad range of courses that we offer. In addition to this, Coteborg University provides an attractive and exceptionally high-standard study environment. Most parts of the university are situated in the city centre and this enriches city life as well as student life. Coteborg has a lot to offer its students: it has a rich and varied cultural life with many theatres, concerts and festivals. For those looking for outdoor life, forests and vast recreation areas are not far away from the city centre; the sea and the archipelago are also within easy reach. Industry and commerce are expanding, and have a joint interest with the University in meeting the ever-changing and growing demands of society. Coteborg University strives to be an attractive choice for students from all over the world. We look forward to welcoming you to Coteborg University.
Question: The main reasons for Coteborg University's popularity according to the passage is _ .
Options: (A) the high quality education and research and the wide range of courses (B) the convenient traffic (C) its excellent location and fast developing economical environment (D) famous professors and friendly students
Example Output:
A