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: 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
Example output: B
Example 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.
Q: Article: Used by over half a million learners,English Practice is one of the world's most popular online English learning products. English Practice offers over 40,000 interactive 1essons for all levels of students who want to study and improve their English. Our structured content will help you improve your speaking,vocabulary,grammar,and your listening and written comprehension. And because English Practice is online,you can study at a pace and at a time that is convenient for you. How to Study When you start with English Practice we will give you a test to evaluate your language level. We will then recommend that you start as either a beginning intermediate or advanced learner. At each level you can take classes in General English,Work Skills,or Community to improve the skills you need. When you have completed enough lessons,we will give you another test and move you up to the next level. General English This is where you will find lessons to improve your grammar,listening comprehension,and vocabulary. There are new lessons weekly so you will always find new 1essons to this area you can also take lessons to prepare for TOEFL and IELTS. Work Skills This is where you can take lessons to teach you the specific skills you will need if you have to speak English at work,or do business in English. There are lessons on general business skills as well as courses to on specific industries. Community In the Community section you find English Practice's popular chat room,where you can practice with fellow students from around the world,and ask English teachers questions about English Community also has fun games like Bingo,Hangman,and Karaoke. As well as links to online English studying resources.
Question: Compared with the courses in class,English practice has the advantage that_.
Options: (A) you can improve your English quickly through it (B) it will offer you the method of how to study English well (C) you can plan your time for English study according to your practical situation (D) you can teach yourself English at any time
A:
C