Sentence Correction

A majority of the international journalists surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future.


(A) that they will, or could,
(B) that they would, or could,
(C) they will be or could
(D) think that they will be or could
(E) think the power stations would or could

The OA is D.But here 'they' refers to what.It's not clear.
Also which is the right usage here "will be or could" or "will or could"

A majority of the international journalists surveyed view nuclear power stations as unsafe at present but that they will, or could, be made sufficiently safe in the future.


(A) that they will, or could,
(B) that they would, or could,
(C) they will be or could
(D) think that they will be or could
(E) think the power stations would or could

In the given sentence, The Parallel Marker but needs both sides to be parallel. "View nuclear power stations...." is parallel with" think ....". This rules out options A, B & C straight away.

In option D and E, watch for parallel marker "OR". If we consider option E, then it will be "would or could be made...". Hence, "be" required after would to make it parallel. Thus option E is wrong.

In option D, Pronoun ambiguity is also an issue, but it's less Prioritize in GMAT compared to Parallelism. Hence, Best answer in these five options is D.

"they" refers to the nuclear power stations. Where is the ambiguity?