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.

Let me give you an 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
The answer to this example can be: B
Here is why: 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.

OK. solve this:
Article: It might not come as a surprise that China fell behind Western countries in a recent UN report on global happiness. China was only ranked 112th happiest country out of 156 in the UN's World Happiness Report in April. The happiest country, it seems, is Denmark, closely followed by three more northern European countries- Finland, Norway, and the Netherlands. But apart from income and lifestyle differences, there are also cultural reasons for this divide. They show that Chinese people and Westerners have different perceptions of happiness. According to a survey conducted by CCTV, income levels most affected Chinese people's sense of well- being (55.5 percent), followed by health (48.9 percent) and quality of marriage or love life (32 percent). It seems that all these criteria are lagging in China, and that the obvious explanation for greater happiness in the West is higher incomes. But not so, says Professor John Helliwell, an American economist at the University of British Columbia and coauthor of the UN report. According to Helliwell, low-income individuals may experience an initial jump in happiness when their money increases, but this feeling decreases as they adapt to their new circumstances. He stresses the example of the US, where, despite GDP figures rising consistently for the past 50 years, happiness has been steadily declining. This is because people desire more than money and material wealth. "To be happy, we need to feel connection, trust and meaningful relationships," explains Helliwell. Dr Deborah Swallow, a UK expert on cultural diversity however, believes there are some differences in the perceptions of happiness in the West and China. "For North Americans and Europeans, happiness tends to be defined in terms of personal achievement, and is best predicted by self-esteem" she says. "For East Asians, happiness tends to be defined in terms of interpersonal connectedness, and is best predicted by how well involved the self is in a social network." Living standards are not necessarily the last word on happiness, as suggested by China's Urban Happiness Ranking 2012, released by the Hong Kong-based China Institute of City Competitiveness in July. According to the survey's results, Qingdao in Shandong province is China's happiest city with a score of 95.08. Surprisingly, China's first-tier cities scored ly low, with Shenzhen ranking 94th, Beijing 96th and Shanghai in 99th position.
Question: According to the passage, which of the following about happiness is Correct?
Options: (A) Happiness has nothing to do with money. (B) A man with healthy body must have the most happiness. (C) A man who has a strong social relationship is sure to be happy. (D) People's sense of happiness is determined by many factors.
Answer:
D