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: Every year, as Spring Festival draws near, most Chinese people will get excited to make preparation for the most important festival and make plan for the winter break. It is a little like Christmas in the United States, but there are some differences between the two festivals. Both the major Chinese and the major Western holidays come during the cold season, and special food is expected. In western countries, cookies and cakes begin just after Thanksgiving in November and show up everywhere. Turkey, potatoes and other food come later. Similar thing happens in China. Entering lunar December, most families will make shopping plans for _ and food is certainly one of the most important things to be considered. At the end of the month, both parents in each family will be very busy---the father is busy buying food while the mother is busy cooking. A deeper similarity is tradition. Christmas, as the letters "Christ" suggests, began as a holiday to celebrate the birthday of Jesus Christ. Many people pray on this day. In China, people living in cities or towns, though they don't plan to sow seeds this month, still celebrate on the big day for farmers. Followers of both holidays are also different from each other. While Chinese people travel to the homes of elder relatives, Americans usually call or send cards. Westerners prefer Christmas carols to fireworks. In Christmas, many family gifts come together instead of one by one, since adults may have only one day free to celebrate. But the most curious difference is about students. Chinese students going home for Spring Festival sometimes report that they get bored by the end of vacation, yet American students seldom get bored around Christmas and western New Year. Not everyone enjoys classic holiday traditions. Students in western countries may get upset, as too much homework, travel or bad family relations may destroy the short holiday season. In China, more and more college students choose to travel or work during the winter holiday instead of going home to stay with their families. It's against the tradition but many people accept it.
Question: What does the writer mainly want to tell us in this passage?
Options: (A) Food in different festivals. (B) Differences between two festivals. (C) Festivals in China and western countries. (D) Traditional celebrations in different countries.

Ex Output:
B

Ex Input:
Article: Although Paris is often considered the city of romance, close to a million adults who call it home are single. Many single people say that France's capital is one of the most difficult places to meet people. The complaints of this lonely group have inspired a new phenomenon known as "supermarket dating." At Galerie Lafayette Gourmet,singles can shop for more than just the items on their grocery list. They can look for someone who has blue eyes, brown hair,and is 1.8 meters tall,or whatever may be on their romantic shopping list. At this Paris location,single people of all ages can schedule their shopping for Thursday nights between 6:30 and 9:00 p.m. When they walk through the door,they pick up a purple basket to advise that they are looking for love. They try to arrive early because the baskets disappear quickly, and then they have to wait in line for their turn to wander the store aisles . With purple baskets in hand, shoppers can consider their romantic options while they pick out their groceries. When they are ready to pay, they can go to the checkout line for singles who want to chat. Most of the people who look for love in the supermarket are skeptical of Internet dating. They know that it is easy to embellish one's appearance or to lie about one's age over the Internet. The supermarket, on the other hand,is considered a safe and casual environment in which to meet a potential match. In addition, what one finds in another's grocery basket can say a thing or two about that person's character or intentions. Buying pet food can be a man's way of showing a potential match that he has a sensitive side. Women who fill their baskets with low-fat food show their healthy style of living. These ways it's possible to find much more than food at a grocery store.
Question: What do many single people in Paris complain about?
Options: (A) The difficulty in meeting people. (B) The idea of supermarket dating. (C) The items on their grocery list. (D) The inconvenience in shopping.

Ex Output:
A

Ex Input:
Article: Museum Visit and Discovery Space When you visit the museum in the Sciencenter, your class can also have a visit to Discovery Space. It is hosted by a Sciencenter educator. Discovery Space provides school-age kids with a place to explore the world of science the way they like. Students will have self-directed independent learning experiences as they try to find the truth about science through activities, games and experiments. A Sciencenter educator can help you find the discovery boxes that are suitable for your school subjects and class interests. Ticket price The Sciencenter welcomes your school group and is pleased to offer discounted tickets to schools for field trips of 10 or more students. For groups smaller than 10, there is no discount. September 1 - February 28: come early and SAVE! Museum Visit Plus Discovery Space: $3.50 per student March 1 - August 31 Museum Visit Plus Discovery Space: $4.50 per student Duration Discovery Space reservations last about 30 minutes. Sciencerter educators will divide large groups into small ones. Each group has 20 persons at most. Please Note Individual Sciencenter memberships are not to be used by school groups for the purpose of cutting school field trip costs. Questions and Reservations For more information or reservations, contact Shannon McSurely, Educator Program Manager, at 607-272-0666 ext. 23 or smcsurely@sciencenter.org.
Question: In Discovery Space, students can _ .
Options: (A) study science in a free way (B) play games with other members (C) watch scientific experiments (D) attend Scientific educators' class

Ex Output:
A