He is saying to not judge a person before knowing them properly. To understand the perpectives of people that face things like discrimination and not to have bad opinions on them.
Using the answer choices provided, D would be the most feasible one in this case.
The correct answer is sentence (5).
A sentence fragment means that it is only a part of a sentence; it is not complete. Given that it is incomplete, the fragment, aka subordinate/dependent sentence, has to be part of a larger, independent sentence, in order to make any sense. So if you combined sentence (5) with another one, it wouldn't be a fragment anymore.
B, D, and E are the correct answers. Literary themes are usually profound statements that teach a "lesson". A and C are just random sentences that don't have meaning.
Most certainly Food,water and shelter that’s theeeeeew most important tooooooo survive until your rescued from that island