The correct answer is D) U.S. forces would withdraw and ARVN troops would assume more combat duties.
President Richard Nixon's plan for Vietnamization of the war was "U.S. forces would withdraw and ARVN troops would assume more combat duties."
The Vietnamization policy was the strategy designed by US President Richard Nixon to gradually reduced the participation of the US troops in the War of Vietnam. Due to the many protests in America against the presence of the US troops in Vietnam and the bad results of the Tet Offense, people increasingly continued to question the US involvement in Vietnam. From then on, the South Vietnamese troops had to more involved in the war with the counseling and training of the US.