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 Q]: Article: If your dog or cat is eating grass, it means it's going to rain. False maybe. There' s no evidence that when a dog or cat is eating grass in the front yard, it' s going to rain. But then, there's no evidence that it isn't going to rain, either. Doctors think dogs and cats eat grass to help make their stomach better or maybe just because they like the taste of it. You'll get sick if you go outside in cold weather with wet hair. False. You might feel cold, but you can't catch a cold because you were outside with wet hair. Many churches have prevented people from throwing rice at weddings because the rice grows larger in a bird's stomach when eaten, causing the bird to explode . True and false. It's true many churches have prevented people from throwing rice, but this is more likely because the rice can become slick on a road or street. There's nothing about rice that will hurt birds. Rice is an important part of many bird's food. Chocolate is Poisonous to dogs. True. Chocolate has theobromine, which can make your dog sick. So, if you don't want to put your dog's life at risk, don't feed it with chocolate. The number of people visiting the hospital goes way up during a full moon. False. According to researchers, there is no evidence that more people visit the hospital during a full moon, though more people do seem to get caught by the police during that time. The idea that the moon influences behavior has been studied for thousands of years--even the word "lunacy", which means crazy behavior, is based on the word "luna" or "moon".
Question: In doctor's opinion, a grass-eating dog or cat _ .
Options: (A) shows animals also have stomach problems. (B) is a sign of rain (C) behaves like that for personal reasons (D) shows animals enjoy tasty food
[EX A]: C

[EX Q]: Article: Different kinds of soil conservation methods are used by farmers to protect their land from damage by farming and the forces of nature. One important form of soil conservation is the use of windbreaks. Windbreaks are barriers formed by trees and other plants with many leaves. Farmers plant them in lines around their fields. Windbreaks stop the wind from blowing soil away. They also keep the wind from destroying or damaging crops. They are very important for growing grains, such as wheat. There have been studies done on windbreaks in parts of West Africa, for example. They found that grain harvests can be twenty percent higher in fields protected by windbreaks compared to fields without such protection. However, windbreaks seem to work best when they allow a little wind to pass through. If the wall of trees and plants stops wind completely, then violent air motions will take place close to the ground. These motions will lift soil into the air where it will be blown away. For this reason, a windbreak is best if it has only sixty to eighty percent of the trees and plants needed to make a solid line. There should be at least two lines in each windbreak. One line should be large trees. The second line, right next to it, can be shorter trees and other plants with leaves. Locally grown trees and plants are best for windbreaks.
Question: What is a windbreak according to the passage?
Options: (A) A windbreak is a concrete wall to prevent the strong winds. (B) A windbreak is a wood with different kinds of trees. (C) A windbreak is a wall of trees to hold soil in place. (D) A windbreak is a wall of wind to fight wind from the opposite way.
[EX A]: C

[EX Q]: Article: John H. Johnson was born in a black family in Arkansas city in 1918. His father died in an accident when John was six. He was reaching the high school age, but his hometown offered no high school for blacks. Fortunately he had a strong-willed caring mother. John remembered that his mother told him many times, "Son, you can be anything you want really to be if you just believe."She told him not to depend on others, including his mother. "You have to earn success, "she said. "All the people who work hard don't succeed, but the only people who do succeed are those who work hard." These words came from a woman with less than a third grade education. She also knew that believing and hard work don't mean everything. So she worked hard as a cook for two years to save enough to take her son, who was then 15, to Chicago. Chicago in 1933 was not the promised land that black southerners were looking for. John's mother and stepfather could not find work. But here John could go to school, and here he learned the power of words--as an editor of the newspaper and yearbook at Du Sable High School His wish was to publish a magazine for blacks. While others discouraged him, John's mother offered him more words to live by."Nothing beats a failure but a try. "She also let him pawn her furniture to get the $ 500 he needed to start the Negro magazine. It is natural that difficulties and failures followed John closely until he became very successful. He always keeps his mother's words in mind."Son, failure is not in your vocabulary!" Now John H. Johnson is one of the 400 richest people in America--worth $ 150 million.
Question: John's mother decided to move to Chicago because _ .
Options: (A) his father died when John was very young (B) life was too hard for them to stay on in their hometown (C) John needed more education badly (D) there were no schools for Negroes in their hometown
[EX A]:
C