What effect did the March on Washington have on the Civil Rights Movement?

a
It led to the passage of the Equal Rights Amendment.
b
It led to the Supreme Court ruling in Brown v. Board of Education.
c
It led to the passage of the Civil Rights Act of 1964.
d
It led the Supreme Court to uphold its ruling in Plessy v. Ferguson.

c

It led to the passage of the Civil Rights Act of 1964.