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.

Q: 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.

A: C
****
Q: Article: Dear Editor, Recent reports have indicated an additional 1, 400 Marines are being sent to Afghanistan in the coming weeks. This means it costs over $1 million annually on the ground over there. I do place a higher level of blame on the policymakers who send soldiers off to kill and be killed in the field. I think the human race needs to think more about killing. One needs to do the _ : "Are these wars JUST?" I believe that all of our wars since 1945 have been illegal, under international law as well. I suggest that all your readers examine their conscience as it relates to the matter of making war. The fact that many soldiers are motivated by a strong sense of duty does not give them some unqualified moral right to support these wars or any other. It's responsible for all the troops, and the entire population, to determine whether the Afghan or Iraq wars are in accordance with the development of the state. I wish someone would give me one or more logical reasons why we are still fighting in Afghanistan and what our goals are. I certainly don't understand it and neither do many who are more knowledgeable than I. Outsiders have tried unsuccessfully for centuries to conquer Afghanistan, and we seem to be no more successful. We are trying to develop a stable central government, but the country is badly divided into ethnic and tribal groups, and the current government is corrupt . Moreover, we are apparently regarded as undesirable occupiers by many of its people, most notably the Taliban. If we are to continue spending billions every year in Afghanistan and killing hundreds of our people and many of theirs, our government must provide us with a reasonable explanation of why we are doing so and what we can expect to accomplish. George Myers
Question: What caused the author to write the letter?
Options: (A) His conscience of being a citizen. (B) Reports about sending soldiers to Afghanistan. (C) His relatives being killed in the war. (D) Getting no reasonable explanation.

A: B
****
Q: Article: Tom Sawyer is known as one of the most beloved characters in American literature , but new research found that Mark Twain based this character on his friend named Tom Sawyer. He admired his firefighting friend so much that he gave the character his name. Mark Twain and Tom Sawyer had many adventures together, gambling in Nevada and drinking in pubs. Tom Sawyer once worked as a volunteer firefighter, policeman and customs officer. Before making his way out West, Tom Sawyer used his strength to save 90 people from a burning ship. Mark Twain was particularly moved by this story because his own brother died in a fire while working on a similar steamboat. The two men became friends immediately after meeting in 1863, with Tom Sawyer traveling to Virginia City, while Mark Twain was working as a reporter there. After one night they returned to San Francisco, Mark Twain told his friend that he would base a character in his yet-unwritten book on him. Tom Sawyer said, "One day he said to me, 'I'm going to put you between the covers of a book, Tom.' 'Go ahead, Sam,' I Said, 'but don't disgrace my name.'" Besides their fondness of drinking, the two men also shared a hobby for storytelling. Tom sawyer believed that it was his anecdotes about his own childhood that inspired Mark Twain to create a book on him. Finally Mark Twain said that the character of Tom sawyer was based on a mix of three real people---John B. Briggs, William Bowen and himself. In spite of this, the historical evidence shows that there might be a fourth, more prominent influencer.
Question: The text mainly tells us that _ .
Options: (A) Tom Sawyer is a popular character in Mark Twain's work (B) Mark Twain based Tom Sawyer on his friend's name (C) Mark Twain and Tom Sawyer are childhood friends (D) Tom Sawyer helped Mark Twain write a popular book

A:
B
****