Which major event was an effect of the united states policy of manifest destiny & why?

a) revolutionary war

b) war of 1812

c) quasi-french war

d) purchasing of florida from spain

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:

i believe the answer is d.