Enslave the Natives. That is a big one.
The idea is known as the Republican form. The idea is that people democratically elect those who would represent them in a government, and those people would be held accountable for what they've done if they do something opposite to the will of the people. It's the only way that a democracy can work properly because others would be impossible with that many people.
B. Other two don't make sense.
The answer is B. I think.
"Peace with Honor" was uttered by U.S. President Richard M. Nixon on January 23, 1973 to describe the Paris Peace Accord that helped end the Vietnam War. The treaty specified that a ceasefire would take place four days later. It was stipulated there that the North Vietnamese would release all U.S. prisoners, and all U.S. troops would withdraw from South Vietnam.
So the closest answer is (A) An exchange of prisoners of war with North Vietnam.