What event most directly contributed to the united states becoming a member of nato?

The answer is D -the Cold War against the Soviet Union

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

originally he was supposed to be dead but they wanted to continue the series so they brought him back to life.