The correct answer is to put pressure on Congress to pass a civil rights bill.
The March on Washington was a momentous event in the Civil Rights movement. This was where Martin Luther King Jr gave his famous "I Have a Dream" speech. The goal of this march was to show the support of American citizens for a civil rights bill that would help ensure legal and social equality for black citizens.
Even though it did not happen in 1963, the Civil Rights Act passed the next year thanks to peaceful protests, marches, and the work by the Kennedy and Johnson administration.