user: 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 input: 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 output: 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.
Q: Article: There are some strange driving laws in different countries. Vietnam:  If you're in Vietnam without a Vietnamese driver's license, you risk a prison sentence of up to 3years. Russia:  In Moscow, if your car is dirty enough to draw dust art, you will be fined about 2,000 rubles. Worse yet, it's not legal to wash your car by hand in public places--forcing you to take it to one of the few car wash facilities. Thailand:  Drivers--males or females--can't drive shirtless, whether it's a car, a bus or a tuk-tuk. France:  France requires its drivers to carry a potable breathalyzer  all the time when driving a car. The one-time breathalyzer cost around US $ 5, and if you don't have one, you will be fined US $ 15. Cyprus: Raising your hands in the car can get you fined of US $ 35. The law states a driver can be fined if the person is not in a regular position inside the car or raises his hands from the steering wheel unnecessarily. Japan:  Politeness isn't just the culture in Japan; it's part of driving laws. Splashing a person by driving through a puddle  with your car will cost you over US $ 60. The country is also strict with its DUI  laws---riding with or lending your car to a driver who gets caught drinking can lead to a fine costing thousands of dollars. 
 Question: Where should you go to wash your car when you are in Moscow? 
 Options: (A) The car wash facilities. (B) Any public place. (C) Your home. (D) The forest.
A:

assistant: A