While researching a history paper, you see a graph that shows federal spending on defense in the past 200 years. you notice that federal spending throughout the late 1900s shows much more spending on defense than in previous decades. what development most likely caused this sustained increase in us peacetime defense spending?
a. cold war
b. world war i
c. vietnam war
d. korean war

A - Cold War. 

Considering that the Cold war lasted for quite some time after the Second World War, it was also very costly in terms of money as it required many scientists and factories working to continuously research different technologies that could defend and protect the United states. It was also done so that the US was armed enough to be able to defend themselves in the case of an attack.