The sit-in at Greensboro, NC, in 1960: A. reflected mounting frustration with the slow pace of racial change. B. was the last of a series of violent agitations for civils rights in 1960. C. had no real effect on the momentum of the civil rights movement. D. was largely organized by the members of Dr. King's SCLC. E. illustrated how civil rights activists embraced the violent message of Malcolm X.