26. 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
Source: Brutal SC's
Again I am having same doubt , I had PM'ed 2-3 GMAT instructors long back but no one replied my luck

This was my query will be glad if someone explain this :
"This is regarding the pronoun antecedent rule . I have one query regarding that.
When we are 100% sure that a pronoun refer backs to a particular noun, I mean it depends on person to person how they interpret.
For example:
The city lights when turned on disturb many residents so they are turned off. (This is ambiguity that residents are turned off, or it is self understood that lights are turned off).
The city lights when turned on disturb many residents so they turn them off. (Who turn Whom off? or it is also self understood that residents turn city lights off).
Plz quote a thumb rule ."
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Plz Correct me if I am deviating somewhere!!
Consider KUDOS if the post was informative!!