Answer:
A. left thousands of North Vietnamese troops in South Vietnam.
Explanation:
The cease-fire agreement agreed to halt the violence from both sides, the United States and North Vietnam. It also specifies that the United States and other foreign forces withdraw from south Vietnam land within 60 days. But this pose a serious trouble for the South Vietnam President Nguyen Van Thieu who objected to the large number of northern Vietnamese troop presence there, which could occupy south at the first opportunity.
