How did the domino theory influence the United States' role in the Vietnam War?

A)
Vietnamization became the new U. S. foreign policy.

B)
The United States adopted a position of neutrality.

C)
It forced the United States to support the Vietcong.

D)
It convinced the government to become involved in the war.
E

The correct answer among the choices provided is option D. Domino Theory convinced the government to become involved in the war.

Explanation:

D)It convinced the government to become involved in the war.

Explanation:

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.

the answer is b: an economic crisis throughout the country.