The correct answer is A) the United States would retreat within a year.
Once the peace treaty was signed in Paris, what took place was that the United States would retreat within a year.
On January 27, 1973, the United States signed a peace treaty in Paris, France, with North Vietnam, South Vietnam, and the Viet Cong. The treaty formally ended the hostilities in Vietnam and initiated a period of peace. However, South Vietnam presented a separated document where they did not include the Viet Cong. As part of the treaty, the United States agreed to withdraw all its troops in the next 60 days and dismantle all the bases. In return, North Vietnam would release all American prisoners.