Why Was the 1963 March on Washington Significant in the History

Why was the 1963 March on Washington significant in the history of the civil rights movement?

A) Conflicts between moderate and militant activists signaled an emerging rift in the larger civil rights movement.
B) The march started peacefully but devolved into violence after local police beat protesters who refused to disperse.
C) The emotional march helped swing the balance of power in Congress and made it easier to pass civil rights legislation.
D) The march,which consisted of approximately 250,000 black protesters and few whites,illustrated the movement's lack of broad-based white support.