How will the right answer fit in terms of support and conclusion?

Only the right answer will match your highlighted conclusion.

Highlight the main conclusion in the passage, if there is one:

Gillette’s argument is not persuasive

Ethicist: [BACKGROUND]. [CONCLUSION], because [SUPPORT].

LSAT authors love to disagree, so you should recognize a set up that sounds like ‘Some people say…’ In this one, “Robert Gillette has argued” at the beginning clearly signals the author will disagree, and that disagreement will be the conclusion. It makes these “conclusion” prompts among the easiest on the test.

Map the wording of the answers to the wording of the passage:

(A) Gillette’s argument wrongly assumes…

Careful, the author never actually said this. That pretty much disqualifies it from being the conclusion. Make sure you’re clear that saying someone’s “argument is not persuasive” is not the same as saying they’re wrong.

(B) …might ultimately harm human beings more than benefit them.

That matches the support at the end of the passage, but no support is given for this. So it’s not a conclusion.

(C) …genetic research should not be conducted.

The author never said that, or anything even close.

(D) Gillette’s claim…is overstated.

Saying someone “overstated” their claim isn’t the same as saying their “argument is not persuasive”. This doesn’t map to the conclusion in the passage.

(E) Gillette’s argument is unconvincing…

This is the only answer that uses wording that means the same as “not persuasive”, and it matches the reasoning the author gave after “because” too.

(E) is the correct answer.