Correct option is D
The most appropriate antonym of the word "distinct" to fill in the blank is "vague."
· "Vague" means not clearly expressed or defined, which is the opposite of "distinct" (clearly noticeable or defined).
· As per the context, the word "vague" fits in very well and hence, it is the correct option.
· Synonyms: Clear, definite, precise, noticeable.
· Antonyms: Vague, indistinct, unclear, ambiguous.
Meanings of other given words:
· Terrible: Extremely bad or serious.
· Critical: Expressing adverse or disapproving comments or judgments.
· Prior: Existing or coming before in time, order, or importance.
· Correct sentence: A vague sense of restlessness was bothering me when I left the cemetery.