Answer: A. adjective
The word "inviolate" refers to something that is unbroken or untouched. It transmits an idea of something perfect and untarnished. In this sentence, the word is used as an adjective. We know this because an adjective's function in a sentence is to modify a noun or pronoun. In this sentence, the word "inviolate" is modifying the pronoun "it," which is used as a substitute of the noun "maze."