The correctly punctuated sentences are options (B) and (D): "Who borrowed Celeste's biology books?" they both seem to be the same sentence.
Who is a question word, and the apostrophe is the depiction of they are Celeste's books? The question is all about who borrowed her biology books. The question mark is the correct punctuation.
As a result, options (B) and (D) are the correct answers.
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