题目：
According to a recent survey, marriage is fattening. Cited as evidence is the survey’s finding that the average woman gains 23 pounds and the average man gains 18 pounds during 13 years of marriage.
The answer to which of the following questions would be most relevant in evaluating the reasoning presented in the survey
A．Why was the period of time studied in the survey 13 years, rather than 12 or 14
B．Did some of the men surveyed gain less than 18 pounds during the time they were married
C．How much weight is gained or lost in 13 years by single people of comparable age to those surveyed
D．Were the women surveyed as active as the men surveyed, at the time the survey was made
E．(E) Will the reported gains be maintained over the lifetimes of the persons surveyed
答案：
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