Question

which of the following contains a vague pronoun reference?

before adam decided on a double major in history and russian literature, he talked to academic advisers about the requirements for each major.

before adam decided on a double major in history and russian literature, he talked to them about the requirements for each major.

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Explanation:

In the second sentence, the pronoun "them" is vague as it's not clear what "them" refers to (unlike the first sentence which uses "academic advisers" for clarity). The first sentence has a clear noun reference ("academic advisers"), while the second's "them" lacks a clear antecedent or has an ambiguous one.

Answer:

The sentence "Before Adam decided on a double major in history and Russian literature, he talked to them about the requirements for each major." contains a vague pronoun reference.