Answer:
D. the United States maintaining a huge military force during
peacetime.
Explanation:
Peace is paramount in life, and United States of America, just like every other countries tries as much as possible to maintain peace both in their country and in the world.
After the two costly wars (World War 1 and 2), it became apparent that, to avoid taken unawares by other countries, there is need to have a large military forces. This forces has to be kept always especially during peace times hence the reason why the industrial military complex emerged.