The answer is B.
It cannot be A since in Gordimer's "Occasion for Loving" Gideon conveys a Black character who openly struggles with his White relationships. He knows he will never have freedom to love Ann.
It cannot be C since in "The Lying Days" traces of how her own mother took care of Black African children with her own daycare center were highlighted.
Letter B is denied in "No Time Like the Present" wherein Steve and Jabu fight against the poor education system the South African government offers.
In the first book Montag read "we cannot tell the precise moment friendship is formed" Montag recalls his feeling when he was with Clarisse. The second book "That favorite subject, myself" Clarisses' favorite subject was not herself.
Answer:
third line is suitable for main theme
The folly of men has enhanced the value of gold and silver because of their scarcity
