Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following 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: B
Reason: 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 instance: Article: Lee Humberg, district manager for the U.S. Department of Agriculture's Animal and Plant Health Inspection Service, is the man in charge of figuring out how to remove the flocks of 15,000 to 20,000 Canada geese that could strike planes flying in and out of the New York area. The Port Authority, the agency that manages airport in New York and New Jersey, estimates that there have been as many as 315 bird strikes annually in the past 30 years. Bird strikes have been a hot topic since a US Airways jet suffered a "double strike" and made an emergency landing on the Hudson River in January 2009. All 155 passengers were rescued safely and the flight was called "Miracle on the Hudson". The plane finally ended up at the Carolinas Aviation Museum. The next major bird strike may not have such a happy ending. To thin the flocks, Humberg and his team have tracked down goose nests and killed eggs with corn oil. They've also terrified the birds with dogs, remote-controlled boats and kites that look like eagles. But the only method that effectively decreases the goose population is the one that angers animal lovers the most: gassing hundreds at a time. "If all you are doing is goose harassment every day, it's very frustrating, because you are just playing Ping-Pong with the birds," Humberg told New York magazine. "It's basically an arms race to come up with the tools to deal with them." Now New York City plans to send the geese captured to Pennsylvania to be cooked and distributed at food banks as meals for the poor. That might just be a fate better than flying into a 747 engine.
Question: What can we learn form Humberg?
Options: (A) He does research on geese's living conditions. (B) He makes efforts to protect wild birds. (C) He deals with the danger of birds at airports. (D) He tries to find newer and safer airlines.
Student:
C