It's B. Whose pumpkin weighed more than 500 pounds. Usually, the words "whose", "who", and "whom" are part of an adjective clause.
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the answer is B) whose pumpkin weighed more than 500 pounds.
The adjective clause in the sentence is "whose pumpkin weighed more than 500 pounds," which provides additional information about the farmer. It starts with the relative pronoun "whose" and describes the pumpkin that belongs to the farmer. Thus, the correct answer is B.
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