[問題]GWD5-Q13 (版上沒相關資料)

[yuanashley]

我在CD上也找不到這题解答,所以懇請版上的高手幫忙判斷我這樣的思路是不是有問題。

GWD5-Q13:
It is true of both men and women that those who marry as young adults live longer than those who never marry. This does not show that marriage causes people to live longer, since, as compared with other people of the same age, young adults who are about to get married have fewer of the unhealthy habits that can cause a person to have a shorter life, most notably smoking and immoderate drinking of alcohol.

Which of the following, if true, most strengthens the argument above?

A. Marriage tends to cause people to engage less regularly in sports that involve risk of bodily harm.
B. A married person who has an unhealthy habit is more likely to give up that habit than a person with the same habit who is unmarried.
C. A person who smokes is much more likely than a nonsmoker to marry a person who smokes at the time of marriage, and the same is true for people who drink alcohol immoderately.
D. Among people who marry as young adults, most of those who give up an unhealthy habit after marriage do not resume the habit later in life.
E. Among people who as young adults neither drink alcohol immoderately nor smoke, those who never marry live as long as those who marry.

我對這题的理解判斷如下:
A錯在無關比較
B錯在比較對象的身分錯誤，與主題無關。題目是說早結婚的人通常比未婚者長壽，並非婚姻使人長壽，而是拿同年紀的人相比，即將結婚的年輕人有比較少的不健康習慣。亦即無關比較。
C 無關類比
D 結婚的年輕人中，大部分婚後都戒掉不健康的習慣，而且往後不會繼續這些習慣。(這是我覺得唯一可以加強作者論點的選項,可是會有點猶疑的地方是：這個選項只有強調結婚者,沒有拿未婚者比較，有點犯了以偏概全的觀點.)
E 不抽菸喝酒的年輕人，不管是結婚或未婚的都活的一樣久，所以結婚與否並不會影響到壽命的長短，而是壞習慣才是造成壽命長短的主因。(這是我後來的思路,因為看到正確答案是E,這是我覺得可能的解釋)


這题正確答案是E 請問為什麼?答案是否是我上述的思路?
又,D錯在哪?
麻煩各位給予指點.謝謝