Which act was a protest against the vietnam war apex?

The acts included demonstrating at a mass rally and joining an anti-war march.

As the Vietnam war dragged and thousands of soldiers continued to die, the voices of the doves became extremely prominent, over those of the hawks. the doves opposed the war and protested in several cities against the war. Historians says that the Vietnam war was not lost in the battle field but in the USA court of public opinion.

D. is the answer on apex