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: Many people say dolphins are very intelligent. They seem to be able think, understand, and learn things quickly. But they are smart like humans or more like cats or dogs? Dolphins use their brains differently from people. But scientists say dolphin intelligence and human intelligence are alike in some ways. How? FACT 1: Talk to Me Like humans, every dolphin has its own "name". The name is a special whistle . Each dolphin chooses a specific whistle for itself, usually by its first birthday. Actually, scientists think dolphins, like people, "talk" to each other about a lot of things, such as their age, their feelings, or finding food. And, like humans dolphins use a system of sounds and body language to communicate. But understanding their conversations is not easy for humans. No one "speaks dolphin" yet, but some scientists are trying to learn. FACT 2: Let's Play Dolphins are also social animals. They live in groups called pods, and they often join others from different pods to play games and have fun ---just like people. In fact, playing together is something only intelligent animals do. FACT 3: Fishermen's Helpers Dolphins and humans are similar in another way: both make plans to get something they want. In the sea of southern Brazil, for example, dolphins use a interesting strategy to get food. When fish are near a boat, dolphins signal to the fishermen to put their nets in the water. Using this method, the men can catch a lot of fish. What is the advantage for the dolphins? Why do they assist the men? The dolphins get to eat some of the fish.
Question: What is the text mainly about?
Options: (A) The comparison between dolphins and humans. (B) The relationship between dolphins and humans. (C) Different types of dolphins. (D) The habitual behavior of dolphins.

Ex Output:
A

Ex Input:
Article: At first all films were in black and white, but in 1932 the first color film was made. It proved as unpopular as making films had done in the late 1920's. It was not until 1938 that a full length color film was made, and the success of this film made producers everywhere change from black and white to color. This first full-length color film was translated into ten different languages and made Hollywood the main center( )of film industry In the early days of the cinema, other countries had also film industries. Very good films were made in Sweden, Britain, Russia and France. However, because Holleywood had so much money to spend, it kept its position as the world's most important film center. Film actors went to America because they knew they could get a lot of money for every film they made. In 1918 Charlie Chaplin (*)received $5 each day. However, life was not always easy for the film actors. Newspapermen followed them everywhere, and after Charlie Chapine married for the fourth time he became so unpopular with the American public that he had to leave the country and live in Europe.
Question: . Which of the following is correct?
Options: (A) People liked the color film as soon as it was made. (B) At first making films were not popular. (C) Color films were at first silence. (D) Talking films were all color films.

Ex Output:
B

Ex Input:
Article: To some, it's a dream job---eating delicious meals for free and then writing about them. But _ Karen Fernau, a food writer for The Arisona Republic, said when she first started her job -she began to gain weight. "I always looked forward to lunch before this job, then all of a sudden lunch was all day every day. " she says. Nine years later, keeping her weight steady and her health intact is a daily battle. If she knows she will be going to a tasting at a bakery or eating a four-course meal, she usually eats fruits or salads throughout the day. Now she is always keeping track of what's in the food she eats and she says most people don't even look at or consider it. At one tasting task alone, she says, upward of l,000 calories is often added to her day. That's about half of the recommended total calories per day for the average adult. But even though she's thought of a special eating method, Fernau says sticking to it is a daily battle. And food editors, writers and critics across the country couldn't agree more. "When I'm at home or not eating for work, it's healthy food to the extreme," says Phil Vettel, who's been a restaurant critic for the Chicago Tribune for 19 years. Vettle, who eats dinner at four restaurants each week, says unlike most professions, he has no right to choose. "If I'm going out to eat, I can't choose the healthiest thing on the menu, I have to eat when they're bringing me. " While Vettel exercises when he can, Joe Yonan, a food editor at The Washington Post, has strengthened his exercise habits since he started the job two years ago. Yonan says he realized early on that he was gaining weight and immediately hired a personal trainer to meet with three times a week, on top of his body training three to five times a week. Still, it's a struggle that many Americans might envy. After all, it's one thing to get your calories from lobster tails or a delicate chocolate cookie and quite another to get them from sodas and fast-food burgers.
Question: What can we learn about the job of being a food critic?
Options: (A) They enjoy free and delicious dishes and make comments on them. (B) They only work for local magazines and newspapers. (C) Once they become food critics, they tend to stay in the job. (D) Their excellent sense of taste makes them qualified for the job.

Ex Output:
A