Scientists have determined that an effective way to lower cholesterol is to eat three servings of wh...

题目信息

Scientists have determined that an effective way to lower cholesterol is to eat three servings of whole grains every day. Studies have shown that the cholesterol levels of people who did so were significantly lower after six months than were those of people who did not, even though the cholesterol levels of the two groups had been the same before the studies began. Clearly, eating whole grains can have an appreciable effect on cholesterol levels.

The answer to which of the following questions, if true, would be most useful in evaluating the claim about whole grains above?

A:Is it realistic to expect people to eat three servings of whole grains per day?

B:Were the two groups of people in the study involved in the same exercise program?

C:Can the same drop in cholesterol be achieved through medication?

D:Did the study continue to track the subjects beyond six months?

E:Are most consumers aware of the different between whole grains and processed grains?

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正确答案： B:Were the two groups of people in the study involved in the same exercise program?

Conclusion:

eating whole grains can have an appreciable effect on cholesterol levels

Premises:

Scientists: Eating 3 servings of whole grain a day causes decrease in colesterol levels

Study: two grups with same initial colesterol levels. People who ate whole grains had less colesterol after 6 months than people who didin't

Assumption:

All other factors remained the same between the two groups during the study or no other factor caused the result

A) Out of scope

B) This choice questions the assumption by considering an alternative factor that could have affected the results of the study and invalidate the conclusion CORRECT

C)Does nothing to adress differences between the first and second group.

D)Out of scope

E)Out of scope

笔记