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: I was dirty smelly hungry and some somewhere beneath all that, suntanned .It was the end of an Inter-Rail holiday.My body couldn't take any more punishment. My mind couldn't deal with any more foreign timetables, currencies or languages. " _ ," I said, as I stepped onto home ground.I said exactly the same thing the following year.And the next, all I had to do was buy one train ticket and, because I was under twenty--five years old,I could spend a whole month going anywhere I wanted in Europe. Ordinary beds are never the same once you've learnt to sleep, in the passage of a train, the rhythm rocking you into a deep sleep. Carrying all your possessions on your back in a tucksack makes you have a vefy basic approach to travel,and encourages incredible wastefulness that can lead to burning socks that have become too anti-social ,and getting rid of books when finished.On the other hand, _ is entirely in the spirit of Inter--Rail,for common sense and reasoning can be thrown out of the window along with the paperback book and the socks.All it takes to achieve this carefree attitude is one of those tickets in your hand. Any system that enables young people to travef through countries at a rate of more than one a day must be pretty social on that first trip,my friehds mad I were at first unaware of the possibilities of this type of train ticket,thinking it was just an inexpensive way of getting to and from our chosen camp-site in southern France.But the idea of non-stop travel proved too attractive,for there was always just one more country over the border,always that little bit further to go.And what did the extra miles cost us? Nothing. We were not completely uninterested in culture.But this was a first holiday without parents,as it was for most other Inter-Railers,and in organizing our own timetable we left out everything except the most available sights.This was the chance to escape the guided tour,an opportunity to do something different.I took great pride in the fact that.in many places,all I could be bothered to see was the view from the station.We were just there to get by,and to have good time doing so.In this we were not different from most of the other Inter-Raiders with whom we shared passage floors,food and water,money and music. The excitement of travel comes from the sudden reality of somewhere that was previously just a name.It is as if the city in which you arrive never actually existed until the train pulls in at the station and you are able to see it with your own tired eyes for the first time.
Question: At the end of his first trip, the writer said"Never again"because
Options: (A) He fell ill (B) he disliked trains (C) he was tired from the journey (D) he had lost money
Solution: C