Advocates of the domino theory called for the united states to: a. abandon expensive proxy wars in asia, africa, and south america. b. cut off federal funding for the military-industrial complex. c. compete with the soviet union through peaceful programs like nasa. d. contain the spread of communism in every region of the world.

Contain the spread of communism in every region of the world.

Explanation:

what the first or next guy says

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.