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.

Ex Input:
Article: There are many differences between British English and American English.I used to teach a course about the differences between the two.We speak English on both sides of the Atlantic Ocean but we have many differences in our common language.We have examples of the same words having very d ifferent meanings,differing spellings of the same words as well as completely different words for the same things.Here are some examples. A cookie in the US is called a biscuit in the UK.A biscuit in the US is a small cake in the UK.Crisps in the UK,are known as chips,but we British people eat a plate of chips that you call fries in the US.In the UK,a pie can be made from either meat or fruit,while in the US pies are normally made from fruit;pot pies are made from meat.Most things are measured in grams and kilograms in the US,not pounds and ounces. One very obvious difference is the side of the road we each choose to drive on.Petrol in the UK is gas in the US.The place where we fill up our cars,in the UK,is a garage;while in the US,it's a gas station.The term garage is also used as a place to store your car next to or close by your house.In the UK we call a lorry what is known as a truck in the US. An elevator in the US is called a lift here,and the first floor in the US,is calle d the ground floor here,so many visitors get off on the wrong floor in British hotels. I could continue with this. There are countless examples of differences within our one shared language.With so many differences,no wonder it's hard to understand each other well.
Question: The passage is mainly about the differences between British English and American English in _ .
Options: (A) vocabulary (B) grammar (C) sound (D) spelling

Ex Output:
A

Ex Input:
Article: "How did Norman know, Sister Emma?" "He overheard you and Aryan arguing. I suspect that he purposely overheard on you. Norman knew or concluded what profession Aryan practiced. He might well have followed Aryan on his explorations. Whether he did or not is beside the point. When Aryan came back yesterday afternoon, Norman certainly decided that he had made some find, for Aryan told Norman that he would be leaving for the capital to meet the detective the next morning. He probably followed Aryan to your room and overheard what passed between you. "Since you could not act against the law of man and God, he would serve a natural justice in his own way. He took the jar of poison hemlock from the chemistry shop and when Aryan asked for a drink, he supplied it. Norman did not know the precise quantity needed and so Aryan did not suffer the full effects until after the bell called the community into the dining hall for the evening meal." Abbess was following Sister Emma closely. "And then?" "Then I began my investigation, and then the detective arrived seeking Aryan for an explanation for his death." "But who killed Norman?" "Norman knew that sooner or later he would be discovered. But more importantly in his guileless mind there was also the guilt of having taken a man's life to be considered. Norman was a simple man. He decided that he should accept the punishment--the honor-price of a life. What greater honor-price for the life of Aryan could he offer than his own? He also took a draught of poison hemlock." There was a pause.
Question: What may have happened to Aryan?
Options: (A) He was killed by poison. (B) He was found missing. (C) He was poisoned but saved. (D) He went away with what he had found.

Ex Output:
A

Ex Input:
Article: Struggling in the US? Move to China! I graduated from the university with a degree of civil engineering. It is a good field but my heart was not in it. I wanted to be an actor or work in the entertainment industry...living a creative life. My choice of civil engineering was really a mistake but I realized too late. As soon as I graduated, I moved straight to Los Angeles--the home of the film and television industry! For three years, I tried to get a job in that field. I often worked as an extra in movies and TV shows--standing in the background while actors are in the foreground. This was fun for a while, but I wanted a real acting job, where I was speaking! Sadly, in Los Angeles, there is too much competition. Every race and age is represented: old, young, black, white, Asian and thousands of blondish-red haired Midwestern types like me. Being an extra couldn't make enough money for me to live in Los Angeles. I had to do something else for money. After three years of trying, I gave up my dream of being an actor and started a different career. I then tried network-marketing, but in the end, that failed. Seven years after graduating college, I was still in debt, still searching for a satisfactory life. I decided to go back to civil engineering. However, I was starting to get very disappointed with my life. Why is life not like what I expected? I expected to have made a lot of money, gotten married, with a house and nice cars, kids, time freedom, etc. _ I want my life to be different, more satisfactory, more alive. America was not providing that for me... In addition, America was too expensive--always worrying about money was a headache. I wanted a life filled with adventure, romance, friendships, successes, and dreams realized. ... I decided to move to China.
Question: How can we describe the writer's attitude toward life?
Options: (A) Practical (B) Passive (C) Disappointed (D) Positive

Ex Output:
D