Which statement about the civil rights movement of the 1960s is true?

a.
malcolm x encouraged the black muslims to adopt a strategy of violent confrontation.

b.
militant blacks did not agree with martin luther king, jr. about the effectiveness of nonviolent methods.

c.
the congress for racial equality refused to participate in sit-in demonstrations.

d.
all major black civil rights organizations and leaders of the 1960s agreed on the best methods for achieving their goals