OE:
Usual suspects
Parallelism
There is some mighty complex parallelism going on here since we need to juggle two elements: “suggest that” and “either…or”. See each answer choicebelow.
Subject-verb agreement
The noun “fossils” should take “suggest”, not “suggests”. Unfortunately, noticing this only helps get rid of (E).
Not-so-usual suspects
Idiom: Yet TO BE “participle-ed”
This describes something that has yet to happen. We can eliminate (B) and (E).
(A) To
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