Answer:
D) allowing Vietnam to reunify under a democratically-elected government
Step-by-step explanation:
According to the quote from a speech given by President Richard Nixon on November 3, 1969, he talked about the previous administration and how they Americanised the war and his plan to Vietnamise it.
The change in policy that President Nixon was promising to make in this speech was allowing Vietnam to reunify under a democratically-elected government.
Vietnamization is a term used to describe the policy of Richard Nixon to significantly end the US involvement in the Vietnam War by training and equipping South Vietnamese soldiers to fight the war.