The proposal, though attractive at first glance, was found to be replete with loopholes which can have far-reaching consequences.
Show answer & explanation
Correct answer: B
Explanation
Correct Preposition: The word "replete" is always followed by the preposition "with" (e.g., The book is replete with illustrations).
The sentence begins in the past tense ("was found"). To maintain consistency, the potential consequence should also be in a past/conditional form.
"Could" is the past/conditional form of "can."
Option ‘B’ is the correct answer.