How did the Vietnam War influence the foreign policy of Richard Nixon? A. He established a policy that would prevent any expansion of communism.
B. He developed a more limited and strategic policy for the use of American troops.
C. He sought trade alliances with all nations, including communist nations.
D. He advocated for a return to isolationism.

Richard Nixon developed a more limited and strategic policy for the use of American troops. This implies the correct answer is B.

The moment Richard Nixon took office as the president of the United States; there were about 500,000 soldiers that were deployed to Southeast Asia as part of the US plan to help South Vietnam during the Vietnam War.

i think it was   tsar alexander ii