One theme in The Strange Case of Dr. Jekyll and Mr. Hyde is "It is important to trust one’s instinct.” Which line from the book best supports this theme?

The theme is about trusting instinct, or what a person feels even without proof. In choice A, the speaker admits he cannot explain it through learning but trusts his feelings, insisting, “it was Mr. Hyde!” The other lines focus on a key, returning to a room, or identifying a drug rather than trusting instinct.

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