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: 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 solution: 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.

Problem: Article: Dogs are prone to complex emotions such as jealousy and pride, according to scientific research that sheds new light on their relationship with humans. Dogs do not like seeing their owners offering affection to other creatures, especially other dogs, and react negatively when their owners bring home new partners, the research found. Psychologists previously believed most animals lack the "sense of self" needed to experience so-called secondary emotions such as jealousy, embarrassment or guilt. These emotions are more complex than feelings associated with instant reaction such as anger, lust or joy. Dr Friederike Range, of theprefix = st1 /UniversityofVienna's neurobiology department, has shown that dogs feel intensely jealous when they spot that they are unfairly treated compared with other dogs. The dog study is the latest into several species, including cows, horses, cats and sheep, which have shown that animals are far more self-aware than we thought. Dr Paul Morris, a psychologist at theUniversityofPortsmouthwho studies animal emotions, told The Sunday Times, "We are learning that dogs, horses, and perhaps many other species are far more emotionally complex than we ever realised. They can suffer simple forms of many emotions we once thought only primates could experience. " In research among dog owners, Dr Morris found almost all of them reported jealous behaviour by their pets. The dog often tried to keep their owner away from a new lover in the early days of a relationship. Behavioural experts recommend owners keeping their dogs' routine as much as possible when a new partner or child comes along in order to prevent jealous activities from the dog such as interruptions with barking.
Question: It was thought that in the past most animals _ .
Options: (A) are self-aware (B) are not self-aware (C) are intelligent (D) are color1-blind
Solution: B