Why Are Marches Often Ineffective Forms of Protest

Why are marches often ineffective forms of protest?

A) Few people are willing to participate in marches.
B) Leaders of marches often fail to explain the purpose of their protest.
C) Marches are legal only in rural areas where there is little chance of capturing public attention.
D) Marches have become so routine that they no longer capture public attention.
E) They often turn violent, landing their leaders in jail where they cannot be effective leaders for their movements.