[Note] (From Ron)
the comparison must be made between individuals of one genetic composition and individuals of another genetic composition. therefore, (a) and (e) are wrong because "that" is singular; we're supposed to be comparing individuals (plural).
(b) and (c) are wrong because "other"/"another" refers to another genetic composition
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the comparison must be made between individuals of one genetic composition and individuals of another genetic composition. therefore, (a) and (e) are wrong because "that" is singular; we're supposed to be comparing individuals (plural).
(b) and (c) are wrong because "other"/"another" refers to another genetic composition
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