13. 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

Solution:

Parallelism + Pronoun

For parallelism, the correct usage should be “view nuclear power stations…but think”.
Hence, A, B, and C can be eliminated.
E unnecessarily uses ‘power stations’ rather than the pronoun ‘they’. Please understand that there is no problem of reference with ‘they’ here. It cannot refer to international journalists as the term is “A majority of the international journalists”
D is the best choice.

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