The answer would be the last one, leave it as is. B and C change the meaning of the sentence entirely, while A sounds unnatural and is too verbose.
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B. It inserts the reader into a state of wanting more, and it leaves them in suspense, like a cliffhanger in a television show.
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A pronoun antecedent might appear somewhere before the noun.
It is usually found in the same sentence, but sometimes it can appear in the sentence before. However, it is always before the noun, never after it.