What impact did the evacuation of American troops in Vietnam have on the United States?
A. Many Americans became concerned that the loss of the Vietnam War would reduce America's standing as a superpower.
B. Some Americans feared that the success of the North Vietnamese would lead to an invasion of the United States.
C. The fall of Saigon led Americans to believe that the containment policy could not be achieved.
D. Americans feared that returning veterans would cause unemployment to skyrocket and the economy to collapse.