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: Apply for a Library Card Any person who lives, works, attends school or pays property taxes in New York State is eligible to receive a New York Public Library card free of charge. Adult and teen users may either apply online or in person at any New York Public Library location. Applications for children ages 11 and under must be completed in person, and require the signature of a parent. When you apply for a card online, you will receive a 7-digit temporary barcode . This allows you to set a secret code. After you receive your permanent barcode, which is required to borrow materials, search Library databases, or reserve a computer, you must renew your card. Renew or Validate Your Card All adult, teen and child library cards for cardholders must be renewed every three years. New library card applicants who applied for a card online must renew their card before full cardholder privileges can be extended. Cardholders can visit any New York Public Library location to present the required forms of identification in order to renew or validate their card. Cardholders may also email copies of the required forms of identification to patronaccounts@nypl.org. Alternatively, this information may be faxed to 212.621.0278. Forget Your Secret Code? If you forget your secret code, you can provide the library with a valid email address, and click on the link ---"Forgot Your secret code?"  A link with instructions on changing your secret code will be sent to the email address on your account, giving you a brief period of time to update your information. You must select a 4 digit numeric secret code, with no repeating or obvious numbers (e.g. 1234 or 2222).  If you have not provided us with a valid email address, you may visit a library location to reset your secret code. Replace a Lost or Stolen Card Cardholders are responsible for all items on a card, all use made of the card and all charges made against it until it is reported lost or stolen. If your card is lost or stolen, inform the library immediately. Call 917.ASK.NYPL (917.275.6975), email Ask NYPL, or visit to your nearest library to report the card lost. 
 Question: Who can't apply for a New York Public Library card for free? 
 Options: (A) Those who work in New York. (B) Those who travel in New York. (C) Those who live in New York. (D) Those who go there for further study.
Solution:
B