Pre-thinking:The Claim: Clones must be raised and educated, a long-term process that could never produce adults identical to the original in terms of outlook, personality, or goals.
Since we are asked about the "role" that the claim plays, identification of additional context around the claim would help. The stimulus states that ethicists have several reasonable fears about the cloning of human beings. This sentence is followed by the contrasting transitionary word "but", indicating that the passage is going to make a U-turn of sorts ie; while earlier the passage talks about some legitimate fears of ethicists, it is probable that going forward, the passage will talk about things that are
not legitimate fears. Thereafter, one specific "fear" is identified, and the "claim" stated in the question acts as a possible reason for the said "fear" being unreasonable/not likely to come true.
Given the above, let us examine the options:
(A) It is a reason for dismissing the various fears raised by ethicists regarding the cloning of human beings.
The claim is used to oppose the "fear" that a "wealthy person" could create "an army of exact duplicates". Thus it only opposes one specific "fear" regarding cloning of human beings and does not dismiss "various fears fears raised by ethicists". Incorrect.(B) It is evidence that genetic clones will never be produced successfully.
The passage states "More realistic is the possibility that wealthy individuals might use clones as living “organ banks.” Thus, the passage does believe that human genetic clones may be produced successfully. Additionally, the "claim" of different personalities of clones does not impact this possibility in any way. Incorrect.(C) It illustrates the claim that only wealthy people would be able to have genetic duplicates made of themselves.
This option implies that the passage sends the message that none other than wealthy people would be able to have genetic duplicates of themselves. No such claim is made in the passage. Incorrect.(D) It is evidence for the claim that wealthy people might use genetic duplicates of themselves as sources of compatible organs for transplantation.
While the passage does state that "wealthy individuals might use clones as living “organ banks.”", this is presented as alternate use of clones (as opposed to having an "army of exact duplicates") and not as a separate claim for which the lack of identical personalities is evidence. Incorrect.(E) It is a reason for discounting one possible fear concerning the cloning of human beings
Correct. Consistent with our pre-thinking.Hope this helps.