The correct answer is B). Anti-war Democrats had no candidate, so they protested at the convention
The group of antiwar activists that arrive in Chicago to participate in the event considered the convention as a farce. The party´s leader, President Lyndon B. Johnson, previously affirmed that he would not seek another presidential term. He wanted to focus on a possible solution to the War in Vietnam. So he opened the door to Vice President Hubert Humphrey. He did not compete in the primaries.
As anti-war Democrats had no candidate, they protested at the convention with chants like “Dump the Hump!”. Among the protesters, there were civilians, black militants, anarchists, communists, and hippies.