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: A new study has discovered that meditation and oxygen sport together reduce depression .The Rutgers University study found that this mind and body combination, done twice a week for only two months,reduced the symptoms for a group of students by 40 percent. "We are excited by the findings because we saw such a meaningful improvement in both clinically depressed and non--depressed students,"said lead author Dr.Brandon Alderman."It is the first time that both of these two behavioral ways have been looked at together for dealing with depression." Researchers believe the two activities have an interactive effect in _ depression.Alderman and Dr.Tracey Shors discovered that a combination of mental and physical training (MAP)enabled students with major depressive disorder not to let problems or negative thoughts defeat them. Rutgers researchers say those who participated in the study began with 30 minutes of focused attention meditation followed by 30 minutes of oxygen sport.They were told that if their thoughts drifted to the past or the future they should refocus on their breathing,enabling those with depression to accept moment-to-moment changes in attention. Shors,who studies the production of new brain cells in the hippocampus--part of the brain involved in memory and learning--says scientists have shown in animal models that oxygen sport exercise keeps a large number of certain cells alive. The idea for the human intervention came from her laboratory studies,she says,with the main goal of helping individuals acquire new skills so that they can learn to recover from stressful life events. By learning to focus their attention and exercise,people who are fighting depression can acquire new learning skills that can help them process information and reduce the overwhelming recollection of memories from the past,Shors says. "We know these treatments can be practiced over a lifetime and that they will be effective in improving mental health."said Alderman."The good news is that this intervention can be practiced by anyone at any time and at no cost."
Question: What made the research so different?
Options: (A) Adopting a way of meaningful talk. (B) Combining the two ways to treat depression. (C) Treating depression with special medicine. (D) Comparing the depressed with the non-depressed.
A:
B