Which civil right rights tactic was most directly responsible for African Americans gaining equal access to the ballot box especially in southern states during the 20th century

Grave of civil rights activist Medgar Evers in Arlington National Cemetery. ... the civil rights of black Americans, their right to vote was systematically taken away by ... “the equal protection of the laws” to U.S. citizens, which included the former slaves. ... This was the pattern in most of the Southern states during Reconstruction.

Explanation:

i also think he is correct. i believe they came to washington to protest their rights.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.