The patient began to rave incoherently in a fit of high fever.

Answer: Option A

Babble : talk rapidly and continuously in a foolish, excited, or incomprehensible way.
Anger : a strong feeling of annoyance, displeasure, or hostility.
Meekly : in a quiet, gentle, and submissive manner.
Forcefully : in a strong and assertive manner; vigorously.
Rave : talk incoherently, as if one were delirious or mad.

Synonym of Rave is Babble