Need help in explaining why (A) and (D) is wrong.
I understand that we need to strengthen the argument that the firm's need to reduce the tests on live animals and therefore use new tests: cultures of human cells.
However, (A) seems to infer that because there has been a move against live animal tests by social activists, cosmetics firm is motivated to reduce live animal test and use new test.
(D) also seems to implicate that if the number of the tests can be reduced by using human cultures, then the firm should use it instead of live animal test.
I chose (E) anyway but still doubtful. Is (E) the best answer because I don't need to make any inference at all?