Critical Reasoning
试题详情
题目：
Folic acid is a nutrient present in leafy vegetables and some other foods. In the blood, folic acid inhibits the formation of substances found in arterial blockages that commonly cause heart attacks. Moreover, in a long-term study of 10,000 individuals, the subgroup with the highest blood levels of folic acid had fewer heart attacks than the subgroup with the lowest levels. Therefore, a decrease in dietary folic acid will increase the risk of a heart attack.
Which of the following, if true, would most strengthen the argument?
选项:
A、Many of the people who had heart attacks during the study were eating a high-fat diet, which is known to contribute to the formation of arterial blockages.
B、Folic acid cannot be synthesized or stored by the body.
C、Arterial blockages usually take years to develop.
D、The group that had the fewest heart attacks also had the best exercise habits.
E、The subjects in the study were tested for folic acid levels most frequently in the first two years of the study.
答案:
B
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