Question

Your topic is courtesy, and you're writing from the point of view of a caring mentor.

Answer 1

The only one referencing “the working class” is A. But D is another good answer

Answer 2

D. Courtesy yields profits to the impecunious as well as to the wealthy.
 This sentence would be the most persuasive because they are high school graduates from a working-class neighborhood and they would love to hear about gaining profits and become wealthy....