I would say C, because it makes the most sense without the context of the story. If not that one, then D makes sense as well.
The Author uses this argument in the context of the youth of America.
Explanation:
The reason behind the same can be :-
1. Evidence- The author used the youth as the proof as to how the technological revolution brought about a change in the people and there behavior after the technology and the gizmos were invented as the technology got advance.
2. Current Scenario-Seeing the present it is realized that technology and its up gradation has done both pros and cons to the American Society.
The black people would have to eat out back, while whites got to eat inside.
Two five six three = 2563 = Two thousand five hundred and sixty-three
