instruction:
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.
question:
Article: The tallest building in the United States, the One World Trade Center, opened on November 3, 2014 in New York. The building is 1,776 feet tall, making it the 3rd tallest building in the world. It has 104 floors. The building stands in the area where the twin towers of the World Trade Center once stood. On September 11, 2001, a group of terrorists destroyed these twin towers and killed nearly 3,000 people. It took 8 years to build the new One World Trade Center. Does the height of the building in feet reminds you of something in history? _ is the year when the United States declared its independence from Great Britain. One problem with such a tall building is how to clean the windows. Well, a platform hangs from ropes, and workers on the platform clean windows. On November 12, while two men were busy cleaning windows, a rope of the platform broke near the 68th floor. The two men were saved by cutting a hole in the glass window. The two tallest buildings in the world are the BurjKhalifa in Dubai, UAE and the Makkah Royal Clock Tower in Mecca, Saudi Arabia.
Question: When did the One World Trade Center open?
Options: (A) September 11, 2001. (B) September 11, 2011. (C) November 3, 2006. (D) November 3, 2014.
answer:
D

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Article: (NEW YORK)---Scientists have discovered small signs of awareness in some vegetative brain injury patients and have even communicated with one of them---findings that are beneficial to how to assess and care for such people. The new research suggests that standard tests may ignore patients who have some consciousness, and that someday some kind of communication may be possible. In the strongest example, a 29-year-old patient was able to answer yes-or-no questions by picturing specific scenes the doctors asked him to imagine. "We were stunned when this happened," said one study author, Martin Monti of the Brain Sciences Unit in Cambridge. "I find it really amazing. This was a patient who was believed to be vegetative for five years." Ever since a research paper four years ago described obvious signs of awareness in a vegetative patient, families of patients have been demanding brain scans, said Dr. James Bernat, a spokesman for the American Academy for Neurology. But experts said more study is needed before the specialized brain scans could be used in medical treatment. "It's still a research tool," Bernat said. Experts also pointed out that only a few tested patients showed evidence of awareness. And they said it is not clear what degree of consciousness and mental abilities the signs imply. They also noted that the positive signals appeared only in people with traumatic brain injury---not in patients whose brains had been lacking in oxygen, as can happen when the heart stops. The new study used brain scanning called functional MRI, for 23 patients in a vegetative state and 31 that are minimally conscious. Patients are said to be in a vegetative state if they are tested and found unable to do such things as move on command or follow a moving object with their eyes. Minimally conscious patients show signs of awareness, but they are minimal and discontinuous.
Question: What is the practical use of the research?
Options: (A) It leads to studying how to cure vegetative patients. (B) It attracts society to pay more attention to vegetative patients. (C) It helps doctors know whether patients are vegetative or not. (D) It drives the government to care about vegetative patients.
answer:
C

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Article: I walked alongside my father, clutching his right hand.All my clothes were new: the black shoes, the green school uniform, and the red cap.They did not make me happy, however, as tins was the day I was to be thrown into school for the first time.I tried in vain lo convince him that I did nothing wrong all the way, but it didn't help. When we.arrived at the sate we could see the courtyard, vast and full of boys and girls.I hesitated and clung to his hand, but he gently pushed me from him."Be a man, "he said."today you truly begin your life.You will find me waiting for you when it's time to leave." I took a few steps.Then the faces of the boys and girls came into view.I did not know a single one of them, and none of them knew me.I felt I was a stranger who had lost his way.But then some boys began to glance at me in curiosity, and one of them came over and asked, " Who brought you? " "My father," I whispered. ''My father's dead, " he said simply. I did not know what to say.The gate was now closed.Some of the children burst into tears.The bell rang.A lady came along, followed by a group of men.The men began soiling us into ranks.We were formed into an intricate pattern in the great courtyard surrounded by high buildings. Well, it seemed that my misgivings had had no basis.From the first moments I made many friends and fell in love with many girls.I had never imagined school would have this rich variety of experiences. We played all sorts, of games.In the music room we sang our first songs.We also had our first introduction to language.We saw a globe of Earth, which revolved and showed the various continents and countries.We started lean-line numbers, and we were told the story of the Creator of the universe.We ate delicious food, took a little nap, and woke up to go on with friendship and love, playing and learning. Our path, however, was not totally sweet and unclouded.We had to be observant and patient.It was not all a matter of playing and fooling around. Rivalries could bring about pain and hatred or give rise to fighting.And while the lady would sometimes smile, she would often yell and scold.Even more frequently she would resort to physical punishment. The bell rang, announcing the passing of the day and the end of work.The children rushed toward the gate, which was opened again.I said goodbye to friends and sweethearts and passed through the gate.I looked around but found no trace of my father, who had promised to be there.I stepped aside to wait.
Question: The writer hesitated and clung to his father's hand when they got to the school gate because _ .
Options: (A) he loved his father and didn't want to leave his father (B) he had thought attending school meant being punished (C) he was afraid of the punishment given by teachers (D) he did not want to leave his mother and his rather alone at home
answer:
B