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题目材料：
Phytonutrients, found in fresh fruits and vegetables, have beneficial effects on the human cardiovascular system. Because heart disease is a major health concern, American doctors should encourage all people, especially those with heart disease, to eat a diet high in fresh fruits and vegetables.
Which of the following, if true, provides the most support for the argument above?
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A.the combination of soluble and insoluble fibers found in whole grains also support heart health
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B.a large percentage of those who suffer heart disease in the United States do not live close to large agricultural areas where fruits and vegetables are grown
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C.smoking cigarettes is a much more serious health risk than the lack of fresh fruits and vegetables in one's diet
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D.vegetarians tend to live longer than those in the general population
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E.those with heart disease who eat few or no fresh fruits and vegetables have heart attacks at a much higher rate than do those who eat those foods.
E显示答案
