急！FeiFei-38题答案是不是有错

goldwings

aaaaaa

rx_11

这道题答案错了。I'M pretty pretty sure.这道题是POWERSCORE LSAT LOGIC BIBLE上的原题，233页 第四题

应该选A。（A主要错在，CONCLUSION说的是 the depletion of the ozone laye，而不是UV-B。这是个陷阱）。POWERSCORE这本书具体解释如下：

The conclusion of the argument is a causal statement that the depletion of the
ozone layer is the primary cause of the declining amphibian population:
DO = depletion of the ozone layer
DA = decline of amphibian population
C ----->E
DO ------>DA
This conclusion is based on the fact that the ozone layer blocks harmful UV-B
radiation, which amphibians are vulnerable to in both adult and egg form.

Although the argument mentions UV-B radiation, which may sound impressive,
the structure of the reasoning is easy to follow and no knowledge of the
radiation is needed. The conclusion is clearly stated and easy to spot due to the
indicator “thus.” The question stem is a StrengthenX and therefore the four
incorrect answers will each strengthen the argument. As with the previous
question, look for answers that fit the five causal strengthening answer types
discussed earlier.
Answer choice (A): This is the correct answer. The answer fails to shed any
light—positive or negative—on the connection between the ozone depletion
and the amphibian population decline. Because the argument is concerned with
the damage done by UV-B radiation, the fact that UV-B is the only damaging
type of radiation blocked by ozone is irrelevant.
Answer choice (B): This answer choice strengthens the argument by showing
that when the cause is absent in nonamphibian populations, the effect does not
occur .
Answer choice (C): This answer strengthens the argument by showing that the
areas of ozone depletion and amphibian decline match each other, thereby
affirming the data used to make the conclusion .
Answer choice (D): This was the answer most frequently chosen by test takers.
This answer choice strengthens the argument by eliminating an alternate cause
for the effect . Had the natural habitat become smaller over the years
(from say, human encroachment or climatic change) then that shrinkage would
have offered an alternate explanation for the decline in the amphibian
population. By eliminating the possibility of habitat shrinkage, the stated cause
in the argument is strengthened.
Answer choice (E): This answer strengthens the argument by showing that the
decline of the amphibians has mirrored the decline of the ozone layer, thereby
affirming the data used to make the conclusion .


所以选A

milkiss

解释得太好了！想了我好久不知道为啥feifei答案是D。