The first step in President Nixon's program of Vietnamization was:

-the bombing of North Vietnamese cities

-the withdrawal of American servicemen

-sending advisors to Vietnam

-sending additional troops to Vietnam

The withdrawal of American servicemen

The withdrawal of American servicemen

Explanation:

Vietnamization was a strategy by President Richard Nixon that aimed to reduce American involvement in the war. This was a result of the fact that the Vietnam War had become extremely unpopular in the United States. Nixon wanted to transfer his responsibilities to South Vietnam, and the first step in his plan involved withdrawing American servicemen. He also wanted to build up South Vietnam's armed forces and prepare them to carry out their own defense.