A. The simile compares the poison to a fast-moving, toxic element, emphasizing its deadliness.
Explanation:
The ghost doesn't compare the uncle to poison. Nor does he personify the vial. He is literally explaining how the uncle poisoned him by poured the poisonous plant hebona into his ear. Lastly, an apostrophe in literature is when you address someone who isn't there. The ghost isn't addressing the uncle. I believe he is speaking to Hamlet in this scene.
