D. the United States and the Soviet Union
After the president gets a bill they can choose to either approve or veto it. If they veto it goes back to congress to be voted on again. If he approves it becomes a law.
In any nonviolent campaign there are four basic steps: 1) collection of the facts to determine whether injustices are alive; 2) negotiation; 3) self-purification; and 4) direct action.
The Cherokee and Apache are 2 such cultures