Bunuel
Although British and French abolitionists of the late 1700s predicted that manumission and the blockading of slave ships
would gradually undermine it, slavery continued to be the dominant cultural and economic force in southern America until the end of the American Civil War in 1865.
(A) would gradually undermine it
(B) to be a gradual undermining of it
(C) would be a gradual undermining of slavery
(D) to gradually undermine slavery
(E) gradually undermining it
The correct answer is (A), "would gradually undermine it." The sentence is in the past tense, so the verb "undermine" should also be in the past tense. The other options are incorrect because they use the wrong tense or because they do not make sense in the context of the sentence.
Here is a breakdown of the other options:
(B) "to be a gradual undermining of it" is incorrect because it uses the infinitive form of the verb "undermine." The infinitive form is used to express purpose or intent, but in this sentence, the verb is simply describing what would happen.
(C) "would be a gradual undermining of slavery" is incorrect because it is wordy and repetitive. The phrase "a gradual undermining" already implies that the undermining would be gradual, so there is no need to repeat it.
(D) "to gradually undermine slavery" is incorrect because it uses the infinitive form of the verb "undermine." See explanation for option (B).
(E) "gradually undermining it" is incorrect because it is not in the past tense. The sentence is about something that happened in the past, so the verb should also be in the past tense.
Therefore, the correct option is (A), "would gradually undermine it."