Answer:
c. "But their sacrifice brought results. Slowly, but surely, restaurants throughout the South began to abandon their policies of segregation."
Explanation:
The question above is related to the "sit-in movement" that happened in the USA (starting 1960). The movement was a non-violent one and it was meant to give the African-Americans the same, equal rights with the white people. It took many sacrifices before the movement showed results.
It started with the lunch-counter sit-in in Greensboro, North Carolina. This was followed by other people in the USA who also did the tactics as a support for desegregation of races. Though it took time, the restaurants throughout the South began to abandon their policies of segregation. This statement best supports the idea regarding the violence that the activists endured while doing the movement. The people who participated were subjected to verbal abuse and assault, but they suffered in order to achieve a greater cause.