Question

president nixons plan to decrease us involvement in vietnam included
the promotion of americanization.
the hand - over of the war to south vietnam.
the negotiation of a north vietnam takeover.
the quick withdrawal of us troops.

Explanation:

Nixon's plan to reduce US involvement in Vietnam was Vietnamization, which involved handing over the war - effort to South Vietnam. Americanization was an earlier approach. There was no negotiation of a North Vietnam takeover. And it was not a quick withdrawal but a phased one.

Answer:

the hand - over of the war to South Vietnam.