The correct answer for the first question is B. Brightly. It is an adverb that shows in what manner was the action conducted, therefore, it's an adverb of manner.
The correct answer for the second question is D. A verb. Adverbs further describe verbs. They are for verbs what adjectives are for nouns.
Rhetorical devices are used in addition to supporting evidence to help strengthen an argument. Logical fallacies are used as the evidence for an argument and will make it weaker. :D