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: Working at camp is a great journey that not only creates lifelong memories for yourself ,but the chance to make an influence on the loves of children who attend Kids Camp. As a summer camp professional, you are a teacher , a friend and most importantly a role model. Staff-members ensure the Our youngest staff is 18, but most are over 20 years old we desire a staff with a strong interest in children and job-related experience,Each tent has six campers and two staff members ,We run an exciting range of activities and programs such as Athletics, Arts, Basketball ,Computers , Field Games, Fun & Games, Gardening, Hiking, High\Low Ropes Course, Nature Education. Great Reasons to Become a Camp Professional Meet energetic, warm-hearted staff from around the world Gain meaningful leadership experience Sing crazy songs and wear funny costumes A positive challenge you will remember in the rest of your life Make a difference to the life of a child Staff Needs Lifeguards --Red Cross certified preferably holding a current WSI certification High Ropes Staff--training/certification from a nationally recognized organization Fun & Games - lead non-competitive athletic games Juggler/Clown - teach circus skills Archery - with certification from a nationally recognized course Nature/ Garden - with strong knowledge or interest in natural wildlife and gardening Dave Meizels , Camp Director E-mail: demeizels@channe12kidscamp.org Tel:860-742-2267 Contact Dave if you have any questions about our-application process.
Question: What's the main idea of the text?'
Options: (A) .Various activities of Kids Camp. (B) .Benefits of working at Kids Camp. (C) .How to sign up for Kids Camp. (D) .Employing staff for Kids Camp.

A: D
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Q: Article: How men first learned to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thoughts and feelings, actions and things, so that they could communicate with each other; and that later they agreed upon certain signs, called letters, which could be combined to represent those sounds, and which could be written down. Those sounds, whether spoken, or written in letters we call words. The power of words, then, lies in their combinations - the things they bring up before our minds. Words become filled with meaning for us by experience; and the longer we live, the more certain words recall to us the glad and sad events of our past; and the more we read and learn, the more the number of words that mean something to us increases. Great writers are those who not only have great thoughts, but also express these thoughts in words which appeal powerfully to our minds and feelings. This charming and telling use of words is what we call literary style. Above all, the real poet is a master of words. He can convey his meaning in words which sing like music, and which by their position and association can move men to tears. We should therefore learn to choose our words carefully and use them accurately, or they will make our speech silly and rude.
Question: The origin of language _ .
Options: (A) is reflected in sounds and letters (B) is handed down from generation to generation (C) dates back to the prehistoric period (D) is a problem not yet solved

A: D
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Q: Article: The US company iRobot made a new kind of sub-marine , called the Seaglider, last week. The robotic submarine was developed by researchers at the University of Washington. It is about 1.8 meters long and weighs about 52 kilograms. It moves through water at a speed of up to 20-25 kilometers a day and can stay at sea for up to six months before needing a battery recharged. This special character results from its special propulsion system . Unlike a traditional submarine, the Seaglider does not have a propeller . It has an air tank that is emptied and filled to adjust depth, as well as a pair of wings that help to guide and lead the submarine. A traditional submarine, on the other hand, "puts water inside tanks to make it heavier, or it will expel the water to make it lighter," explained Frederick, a professor at the University of Washington. Each time the Seaglider comes to the surface, it sends the data which it collects to its controllers by satellite. Operators can also send the submarine new information. For example, they can change its course in their office through giving the computer orders. Seagliders are already being used for scientific research, such as environmental studies. iRobot also hopes to sell the submarine to the military . At $100,000 each, the Seaglider is a cheap way to keep an eye on the ocean. "These things can go out there and monitor large areas of ocean because they're very persistent. They can go for thousands of miles on their own. At the same time, you can tell them to stay in one place and they can circle," says Helen Greiner, chairwoman of iRobot. "This is science fiction stuff in many ways, but it's really out there and working."
Question: Unlike a traditional submarine, the Seaglider _ .
Options: (A) is only 1.8 meters long and weighs 52 kilograms (B) has an air tank to adjust depth instead of a propeller (C) can travel at a speed of 150 kilometers a day (D) can be used to do environmental research

A:
B
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