Respuesta :

"his disease had sharpened his senses"

Answer:

hearing senses sharper

Explanation:

The book is an except of the first person narrative. The person continuously insists that he is insane. In fact, to be more precise, the disease causes him to have an uncontrolled sense of nervousness and an overacutness of the senses. In fact, the narrator acknowledges that he possess a sharper hearing sense than before.