The correct answer is B) the Democratic Party was divided.
People protested at the Democratic Convention of 1968 because the party was divided.
In 1968, the Democratic Party was in crisis. President Johnson popularity was low due to its decisions in the Vietnam War. So, during the Democratic Convention of August 26-26 in the city of Chicago, people protested in the streets to rally against the Vietnam War, its consequences and the political situation inside the party. The Chicago Police Department had to intervene to control the situation.