Correct option is D
The correct substitution of the highlighted words is (d)
evidence could prove.
Explanation:
· The modal verb “could” when used with the base form “prove” expresses
possibility or
potential in the
past or
hypothetical scenario.
· The phrase “could have proved” would require the sentence to refer to
missed opportunity or failure, which is not indicated in this context.
· The evidence is being discussed as
having potential, so “could prove” is the grammatically accurate and contextually appropriate form.
·
Grammatical rule used:
· “Could + base verb” = to express
possibility in general
· “Could have + past participle” = to express
missed possibility or
unrealized potential in past
·
Example:
· Correct: This clue
could prove his innocence.
· Incorrect: This clue
could have proved his innocence. (unless it’s about a lost chance)
·
Information booster:
· Modal verb combinations are tested frequently in substitution-type questions, especially involving could, should, and might.