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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.

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
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.

New input: Article: In today's throw away society, dealing with the city's growing mountain of waste is an inereasing challenge for the city countil . Recently. Edinburgh is faced with the problem of dssposing of about250,000 Million tons of waster a year . Despite different ways to dispose of much of it in a green manner---largely through encouraging tecycling---its aging facilities such as the Powderhall landfill do not have the ability to deal with it. The European Union(EU) has issued a new policy, regulating how such mountains of waster are to hr disposed of. The five councils (Edinburgh. East Lothian. West Lothian. Midlethian and Borders) face fine around $18million a year from 2013 it they don't inerease recycling levels and rely less on landfill. With this in mind, the coumlls got together with the idea of building a lage incinerator plant to burn half of the waste produced in their districts. But the plan fell apart after the change of target levels by a new UK government waste policy which required that no more than 25% of the city's waste should be disposed of in this way by 2025. After the plan was abandoned, a private company which already transported millions of tons of the city's wast by train to a landfill site near Dunbar, offered an alternative soution when it suggested opening a huge waste site near Portobello. Since Powderhall is supposed to close in 2015, it seemed necessary for the members of the Edinburgh Council to accept the suggestion. But soon they turned it down--after 700 local objections reached them--because it would have meant hundreds of lorries a day making loud noise through heavily populated areas. That still leaves eth council with a problem. By 2013,only50%of 1995 levels of waste will benllewed to be sent to landfill. Even if recveling large are met, there will still be a large amount of rubbish to be burnt up. Due build an Edinburgh and Midlothian councils have now decided to work together to build an ineinerator plant as time to find a solution is fast running out.
Question: The main way of handling waste in a green manmer in Edinburgh is_.
Options: (A) recyeling (B) restoring (C) burying (D) burning
Solution:
A