In order to complete this analogy, we have to look at the first pair of words first. An adverb is a word that modifies a verb, so we need to find the word that an adjective modifies. The correct answer is B. noun.
The answer is a because since it is a verb, it is found in a dictionary like Webster’s.
C; because when you name multiple choices you need to put commas and the colon needs to be after "first" because then you have a pause and list the choices