The weather predictions delivered on television are usually reliable,

Would say the pronoun "they" makes unclear which entity expected. Is it weather condition? is it winds? storms? --> go for B

The weather predictions delivered on television are usually reliable, but winds, storms that could not be foreseen, and ocean currents often cause much more extreme weather conditions than they had expected.


(A) storms that could not be foreseen, and ocean currents often cause much more extreme weather conditions than they had

(B) storms that cannot be foreseen, and ocean currents often cause much more extreme weather conditions than

(C) unforeseeable storms, and ocean currents are the cause of much more extreme weather conditions than they had

(D) storms that are not foreseeable, and ocean currents often cause much more extreme weather conditions than they had

(E) unforeseeable storms, and ocean currents often cause much more extreme weather conditions than they had

THEY HAS NO LOGICAL REFERENT

MANHATTAN REVIEW OFFICIAL EXPLANATION:

This sentence simply has to have its parallel structure corrected. It begins in the present tense, ‘are usually reliable’, so the sentence should continue in the present. Choice A is not in the present tense. ‘They’ in A, C, D and E is a pronoun without a reference. Choice B is the correct answer.

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