"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.
