Bunuel
During the Hundred Days conflict, the Royal British Navy blockaded all the ports of France,
and also prevented Napoleon to escape to North America after his defeat at Waterloo.
A. and also prevented Napoleon to escape
B. and they prevented Napoleon from escaping
C. thereby preventing Napoleon from escaping
D. which is how they prevented Napoleon from escaping
E. with the purpose of preventing Napoleon to escape
Magoosh Official Explanation:
A question about Napoleon and his Hundred Days conflict.
Split #1: IdiomThe verb “prevent” always idiomatically takes “from” + [gerund]. The structure “to prevent from escaping” is correct, and the structure “to prevent to escape” is always wrong. Choices (A) & (E) make this idiom mistake and are incorrect.
Split #2: Pronoun AgreementThe Royal British Navy has a large number of strapping brave lads, but as a noun it is a singular collective noun and it requires a singular pronoun. The use of “they” in (B) & (D) is incorrect.
The “thereby” + [participle] structure is a sophisticated structure for expressing the consequence of an action.
The only possible choice is (C).