By the End of the Student Nonviolent Coordinating Committee's SNCC's)1964

By the end of the Student Nonviolent Coordinating Committee's SNCC's) 1964 Freedom Summer,many volunteers had been violently attacked,arrested,and even killed,indicating what?

A) Violent tactics were more effective than nonviolent ones.
B) The Civil Rights Movement was over.
C) Mississippi was still a very dangerous place for black Americans in 1964.
D) SNCC's young leaders were not prepared for the harsh realities of political organizing.