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: Mark Twain left school when he was twelve. He had little school education. In spite of this, he became the most famous writer of his time. He made millions of dollars by writing. His real name was Samuel Langhorne Clemens, but he is better known to all over the world as Mark Twain, his penname. Mark Twain was born in 1835 and he was not a healthy baby. In fact, he was not expected to live through the first winter. But with his mother's care, he managed to survive. As a boy, he caused much trouble for his parents. He used to play jokes on all his friends and neighbors. He didn't like to go to school, and he often ran away from home. He always went in the direction of the nearby Mississippi. He was nearly drowned nine times. After his father's death, Mark Twain began to work for a printer, who only provided him with food and clothing. Then, he worked as a printer, a river-boat pilot and later joined the army. But shortly after that he became a miner. During this period, he started to write short stories. Afterwards, he became a full-time writer. In 1870, Mark Twain got married. In the years that followed he wrote many books including The Adventures of Tom Sawyer in 1876, and The Adventures of Huckleberry Finn in 1884, which made him famous, and brought him great fortune. Unfortunately, Mark Twain got into debts in bad investments and he had to write large numbers of stories to pay these debts. In 1904, his wife died, and then three of his children passed away. At the age of 70, his hair was completely white. He bought many white suits and neckties. He wore nothing but white from head to foot until his death on April 21, 1910.
Question: In Mark Twain's childhood, _ .
Options: (A) he learned a lot at school (B) his mother often worried about his safety (C) he often went swimming with other boys (D) he often played games with other boys

Ex Output:
B

Ex Input:
Article: Growing up in Puerto Rico, our family was no different from so many others. My parents got married after my father came back when the war ended. Both of my parents were struggling with the hard economic realities of the time. But somehow, they found time to cherish those cultural values that shaped our everyday life. In our daily life, we celebrated together with our friends or family members every birthday, every graduation, and all holidays with music and dancing, typical foods. When we visited our family in the countryside -- a trip that took about two hours in a car, with five children fighting as to who would get a window or the front seat -- we would break into song, and somehow the trip would turn into one full of happiness and fun. We would sing not only interesting children's songs but also beautiful love songs -- songs about the love of the country though we didn't understand the meaning of the words many times. I came to Philadelphia for the first time in 1973 to do a residency in family medicine. I remember the many hours of work. I was facing issues of life and death and suffering the clearly social unfairness and issues of poverty and race. These were all aggravated by my feeling of cultural differences. An important turning point in my life happened one Saturday night when I attended a concert of Puerto Rican singer and composer Antonio Caban Vale. The music showed my familiar rhythms, and the words spoke to my heart. I had found a space to express, celebrate, and share my culture in Philadelphia. Therefore, I believe diversity is seen as an advantage and not as a disadvantage. As a Puerto Rican, I am a mixture of races and I believe in my strength because of this.
Question: What do we know about the author's parents?
Options: (A) They lived a well-off life. (B) They were famous in Puerto Rico. (C) They had different cultural values. (D) They took cultural values seriously.

Ex Output:
D

Ex Input:
Article: The International Space Station,one of the most ambitious space projects ever and a key launching board for exploration of the solar system,turns l0 years old Thursday. On Nov.20,1998,the first part of the space station was launched by the Russians from Kazakhstan.NASA followed up two weeks later with Piece No 2 carried up by a space shuttle. The space station has grown into a giant outpost 355 km up,home to three people at any given time--soon to be six. Thanks to the newly arrived shuttle Endeavour,the space station now has five sleep stations,two baths,two kitchens and two mini--gyms.Ahogether,there are nine rooms,three of which are full scale labs. The United States has financed the main part of the project,estimated to cost some 100 billion dollars.Fifteen other countries have also contributed,including Russia,Japan,Canada,Brazil anti eleven nations belonging to the European Space Agency. Fhe space station has traveled 2.1 billion km,orbited Earth more than 57,300 times,hosted 167 people from 15 countries,and served up more than l 9,000 meals "The ISS is the largest ever expenment in international technological cooperation," said John Logsdon. a historian at the National Air and Space Museum in US. "1 think it's a necessary stepping stone to long--term human activities in new Areas of operations,"Logsdon said.The station is"off the planet and it's the first Step outward--not all end in itself,but a step along the way."
Question: Piece No 2 of the ISS was put into orbit oil _
Options: (A) Nov.6,1998 (B) Nov.24,1998 (C) Dec.8,1998 (D) Dec.9,1998

Ex Output:
C