15. Susan: Those who oppose experimentation on animals do not properly value the preservation of human life. Although animal suffering is unfortunate, it is justifiable if it can lead to cures for human ailments.
Melvin: But much animal experimentation involves testing of ordinary consumer products such as soaps, dyes, and cosmetics.
Susan: These experiments are justifiable on the same grounds, since cleanliness, convenience, and beauty are worthwhile human values deserving of support.
Which of the following is the best statement of the logical flaw in Susan’s argument?
(A) Her claim that animal experimentation is justifiable if it supports human values contradicts her claim that such experimentation is justifiable only if it leads to cures for human ailments.
(B) She places a higher value on human cleanliness, convenience, and beauty than she does on the preservation of animal life.
(C) She uses the word “value” in two different senses.
(D) She assumes that all ordinary consumer products aid in the preservation of human life.（E）
(E) She fails to show how mere support for human values actually preserves human lives.
没人问过这到题。我选的C，我觉得一个是value是指生命，后一个指的是其他的。
看了答案，觉得E似乎也可以，但我做题的时候，一定不会想到选它。
另外D，错的原因是"all”吗？
请大家指导思路一下，谢谢了
5555...我錯的也跟妳一樣...>_<
前面说动物实验能治病救人，所以是可取的
后面说动物实验能实现人类追求的价值，所以可取。
二者等同才能说明问题，但是没有做到。
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