Answered

Both Gandhi and King appeal to the audience's reasoning by saying it is

Aunderstandable that change only comes when the leaders of a country take on national issues.
Bup to the people and their ability to solve the problems of racial injustice, poverty, and war.
Cnecessary to use force if the nonviolent protest does not achieve the results desired.
Duseless to fight against moral and spiritual problems when it impossible for mankind to agree.