[問題] PP3 CR 75

[william1304 (威廉)]

In the year following an eight-cent increase in the federal tax on a pack of
cigarettes, sales of cigarettes fell ten percent.  In contrast, in the year
prior to the tax increase, sales had fallen one percent.The volume of
cigarette sales is therefore strongly related to the after-tax
price of a pack of cigarettes.

Which of the following, if true, would most strengthen the argument above?

A. During the second year after the tax increase, cigarette sales increased
by a significant amount.

B. The information available to consumers on the health risks of smoking
remained largely unchanged in the period before and after the tax increase.

C. Most consumers were unaware that the tax on cigarettes was going to
increase.

D. During the year following the cigarette tax increase, many consumers had
less income, in inflation-adjusted dollars, than they had had in the previous
year.

E. During the year after the tax increase, there was a greater variety of
cigarettes on the market than there had been during the previous year.




答案是B,想請問為何C不行,謝謝大家~~

--
※ 發信站: 批踢踢實業坊(ptt.cc) 
◆ From: 220.136.115.76
推 dadawang:我認為c不行是因為原文結論說消費者在乎的是睡後價格
→ dadawang:但是我不太懂為啥B可以..雖然其他答案都不對
推 pentimento:這題原文是因果關係：「因為漲價，所以銷量減小」而支
→ pentimento:持的方法之一是「反駁的反駁法」。故將答案(B)的
→ pentimento:unchanged 改成 changed 的話，因果關係會成為「因對
→ pentimento:健康的風險認識有所改變，而影響到香煙銷量」。這樣便
→ pentimento:是「另有他因」的反駁。亦即原文的 unchanged 就成了
→ pentimento:支持答案。至於(C)的問題，就要請原po 先一下覺得能夠
→ pentimento:支持的理由，這樣才好討論。
→ william1304:懂了, 謝謝大大解答
→ sneak: 這題原文是因果關係：「 https://daxiv.com