How to identify the predicate of a sentence.

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Explanation:

A predicate is the part of a sentence, or a clause, that tells what the subject is doing or what the subject is. Let's take the same sentence from before: “The cat is sleeping in the sun.” The clause sleeping in the sun is the predicate; it's dictating what the cat is doing.

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the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.