Since the sentence is correct W.R.T faulty reference.
So option D is the right answer
Why do acids not show acidic behavior in the absence of water?A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers). On the scale of the universe, measuring distances in miles or kilometers doesn't cut it
Answer:
D. squeamish
Explanation:
This is the only adjective here. All the others are nouns/verbs.
