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

“but” should not be highlighted.. as part of the question:
Ans: (D) think that they will be or could
E. “they” in option D is ambigious
E.
E, speks more clearly about the power stations, i agree they is ambigious.
(D) think that they will be or could
correct answer D.
GMAT Team, please explain how can it be D as they is ambiguous. It should be E.
In this case pronoun “they” can be used for journalist and power stations two antecedents nouns in the sentence. It is the clear case of ambiguity of the the pronoun. The noun power statins in option E removes this ambiguity. So correct answer is E.
Sorry for typo correct answer is E.
I would vouch for option E
E
E