Answer:
A
Explanation:
Jerry looks ill today, ill is an adjective. In answer B, disdainfully is an adverb. I know this because adverbs usually contain -ly at the end of a word to turn an adjective into an adverb. C contains a preposition, into, which turns into a prepositional phrase with "into the microscope." The same goes for D. At is a preposition.
i hope this helps.
