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: I was born in Tuckahoe,Talbot Country,Maryland. I have no accurate knowledge of my age,never having seen any record containing it. By far the larger part of the slaves know as little of their ages as horses know of theirs,and it is the wish of most masters within my knowledge to keep their slaves thus ignorant .I do not remember having ever met a slave who could tell of his birthday. They seldom come nearer to _ than plantingtime,harvesting,springtime,or falltime. A lack of information concerning my own was a source of unhappiness to me even during childhood. The white children could tell their ages,but I could not tell. Why the same right ought to be taken away from me!I was not allowed to ask my master about it. He considered all such questions on the part of a slave improper and impolite. The nearest estimate I can live makes me now between twentyseven and twentyeight years of age. I come to this,from hearing my master say,some time during 1835,I was about seventeen years old. My mother was named Harriet Bailey. She was the daughter of Isaac and Betsey Bailey,both colored,and quite dark. My father was a white man. The opinion was also whispered that my master was my father;but of the correctness of this opinion,I know nothing and I have no means to know. My mother and I were separated when I was but an infant--before I knew her as my mother. It is a common custom,in the part of Maryland from which I ran away,to part children from their mothers at a very early age. Frequently,before the child has reached its twelfth month,its mother is taken from it,and hired out on some farm a considerable distance off,and the child is placed under the care of an older woman,too old for field labor.
Question: It can be learned from the text that _ .
Options: (A) the slaves forgot the exact time when they were born (B) the writer didn't know whether his master was his father (C) the writer was about twentyseven years old in 1835 (D) the writer's mother left him as soon as he was born

Ex Output:
B

Ex 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.

Ex Output:
D

Ex Input:
Article: Austin Children's Museum This 7,000-square-foot museum aims to entertain and educate children up to age 9. In its Global City exhibit, they can go grocery shopping, order lunch at a diner, pretend that they are doctors, or construction workers, and more. In other fun exhibits, they learn about Austin's history, explore the world of water, experience life on a large prefix = st1 /Texasfarm.(Tues-Sat 10am-5pm, Sun noon-5pm) Address: 210 Colorado St,Austin,Texas78701 Phone:(512)472-2499 Brooklyn Children's Museum Founded in 1899, this is the world's oldest children's museum, featuring interactive exhibits, workshops, and special events. "The Mystery of Things" teaches children about cultural and scientific objects, and "Music Mix" welcomes young people.(Wed-Fri-2-5pm, Sat-Sun 10am-5pm) Address: 145 Brooklyn Ave,Brooklyn,New York11213 Phone:(718)735-4400 Children's Discovery Museum This museum's hand-on exhibits explore the relationships between the natural and the created worlds, and among people of different cultures and times. Exhibits include "Streets", a 5/8-scale copy of an actual city, with street lights, and "waterworks" which allows an operation of pumps to move water through a reservoir system.(Mon-Sat 10 am-5 pm; closed on holidays) Address: 180 Woz Way, Guadalupe River Park,San Jose,California95110 Phone:(408)298-5437 Children's Museum of Indianapolis This museum is the largest of its kind. Exhibits cover science, culture, space, history and exploration. Among them are the Space Quest Planetarium(additional fee), the 33-foot-high Water Clock, the Playscape gallery for preschoolers, and the Dinosphere exhibit, along with hands-on science exhibits. The largest gallery, the Center for Exploration, is designed for ages 12 and up.(Tues-Sun 10 am-5 pm; closed on Thanksgiving, Dec25) Address: 3000N Meridian St,Indianapolis,Indiana46208 Phone:(317)334-3322
Question: If you want to know more information about "The Mystery of Things", you'd better ring _ .
Options: (A) (521)472-2499 (B) (718)735-4400 (C) (408)298-5437 (D) (317)334-3322

Ex Output:
B