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.
One example: Article: Homework can put you in a bad mood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Question: Researchers did experiments on kids in order to find out _ .
Options: (A) how they really feel when they are learning (B) whether mood affects their learning ability (C) what methods are easy for kids to learn (D) the relationship between sadness and happiness
Solution is here: B
Explanation: It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment. So, B is the correct answer.

Now, solve this: Article: STRANGERS parties go wild these days. The main idea of them is to never let the people know who their matches are until the last minute. These are some popular practices that are storming the world's youth on this V-day. Speed dating It's exactly what the name implies. Complete with a timer, a whistle and 50 willing singles, speed dating is not the traditional dinner and a movie type of first date. Singles pay US $35 for three minutes with more than two dozen future dates. They ask questions and try to get to know each other. At the sound of a whistle, they do the same thing all over again--25 times in all. Lock and key party Women are given a lock and men are given a key, upon arriving at the party. Each key and lock has several matches. One can hunt for his/her later-to-be sweetheart in various groups, and try out the key or lock. Each time a lock and key match the pair are entered into a ballot for top prizes! Dinner in the dark Waiters wearing night vision glasses guide the guests through the pitch-black dining room. They are seated at the table and familiarized with the wine glass and plate. Food is handled with the fingers. People will not see the food they are eating or the guests at their table until the dessert course. At that moment, dining partners will appear. Message party Have A Cocktail, Leave A Message! When you arrive, you get a tag with a number and a pad of post-it notes. If you see someone you like, write a message on the message board. But wait... You've got a message... Go and collect it! You can make new friends and win lots of gifts. The more messages you leave on the bulletin board, the more chances you have of winning prizes.
Question: What do you think the similarities of these parties are?
Options: (A) All the parties have very strict rules for their members. (B) If you want to go to any of the parties, you have to buy a ticket. (C) All the parties are aimed at strangers who want to be lovers. (D) All the parties are suitable not only for the young but for the old.
Solution:
C