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.

Input: Consider Input: Article: The following are letters to the editor of a school newspaper Dear editor, I'd like to express my opinion about grades. Students should be allowed to study without worrying about grades. Fortunately, most educators are becoming aware of the fact that students have different interests and abilities. I understand that grades are useful, but grades often limit creativity. Competing for better grades causes many students to turn down opportunities to pursue music, dramatics and sports. Grades force an arbitrary standard of success on everyone. I do not demand as some extremists do, that grades be removed immediately. However, I do believe that less emphasis should be placed on grades. I hope that someday grades will become optional at Village High School. Magdalena Smith Drama Club Dear editor, I'd like to say something about grades. Let's face the facts about grades. Grades perform three basic functions. First, grades motivate students to work at their highest level of competence. Second, they act as a reward for hardworking students and as a punishment to students who do not work hard. Finally, grades are used as an effective standard by which to measure student achievement. Good grades help students to get jobs and to get into university. I've spoken with a number of students who have jobs, and most of them say that they were hired primarily on the basis of their grades. My grades helped me land a part-time job and will help me get into university next year. I think grades are extremely important at Village High School. Simon Harper Science Club
Question: Which of the following is not Magdalena Smith's opinion?
Options: (A) Students may give up the chance to learn music and sports for grades. (B) Students' creativity may not be developed for grades. (C) Grades should not be used to measure a person's success. (D) Grades should be taken away at once.

Output: D

Input: Consider Input: Article: Dear Volunteers, The service you will provide to elderly individuals in Abilene as a Meals on Wheels volunteer is deeply appreciated. I want to take this opportunity to thank you for the many miles you will travel and all of the hours you will contribute to help make this one of the best programs in the entire state. We have our staff members make a home visit before adding each person to the program and try to visit everyone at least once every year. That is hardly enough, and we depend on your contact a great deal! It is important that you report back when you do not get an answer to your knock on the door. The person inside may be hurt or ill. They may be in hospital or out of town and fail to inform us. If they are frequently absent, we may need to determine if they still need meals. If you find someone with a medical emergency, please call 911 to request medical assistance, and then call the Meals on Wheels office. If you find someone who needs assistance other than for a medical emergency, please call the Meals on Wheels office at 6725050, and we will try to find the appropriate agency or individual to call. Let us know when a certain person needs extra food. We have a food preparation room of shelf stable items to share with them. Please feel free to take a few magazines when you deliver meals. Many of those we serve cannot afford magazines and enjoy reading. If someone is interested in getting books from the Abilene Public Library, let us know. We can sign them up for the Books on Wheels program. Call if you smell gas strongly when you deliver meals, or if someone needs a space heater, a blanket, or an electric fan. Please convey all needs to us, and we will try to see that they are met. Some of the elderly people who we offer our service may have cancers, liver diseases, AIDS, etc. If you do not want to deliver meals to the people with certain types of health problems, such as these, please let us know. Sincerely, Betty L. Bradley, LBSW, Executive Director
Question: Why does the author write this letter?
Options: (A) To express great thanks to volunteers. (B) To explain how the old people get help. (C) To tell volunteers what they are tasked with. (D) To describe the life situation of the old people.

Output: C

Input: Consider Input: Article: He could have been president of Israel or played violin at Carnegie Hall, but he was too busy thinking. His thinking on God, love and the meaning of life graces our greeting cards and day-timers. Fifty years after his death, his shock of white hair and hanging moustache still symbolize genius. Einstein remains the foremost scientist of the modern time. Looking back 2,400 years, only Newton ,Galileo and Aristotle were his equals. Around the world , universities and academies are celebrating the 100th anniversary of Einstein's "miracle year" when he published five scientific papers in 1905 that basically changed our grasp of space, time ,light and matter. Only he could top himself about a decade later with his theory of relativity. Born in the age of horse-drawn carriages, his ideas launched a technological revolution that has made more changes in a century than in the previous two thousand years. Computers, satellites, telecommunications, lasers, televisions and nuclear power all owe their invention to ways in which Einstein exposed a stranger and more complicated reality underneath the world. He escaped Hitler's Germany and devoted the rest of his life to human rights and peace with an authority unmatched by any scientist today, or even most politicians and religious leaders. He spoke out against fascism and racial prejudice. His FBI file ran 1,400 pages. His letters expose a disorderly personal life - married twice and indifferent toward his children while absorbed in physics. Yet he charmed lovers and admirers with poetry and sailboat outings. Friends and neighbors fiercely protected his privacy.
Question: When you think of Einstein, what typical appearance was formed in your mind?
Options: (A) Funny and humorous, with an air of a musician. (B) Wearing very wide trousers and a moustache, with an image of an actor. (C) Rough untidy mass of white hair and hanging moustache , with an image of thinking . (D) Black long hair and moustache, with his eyes deep set.
Output: C