How did entering World War II change the U.S. economy?
a.
Less people worked since they did not know how to make materials for war.
b.
The U.S. had to rebuild their factories completely to change to making war materials.
c.
Factories changed their production focus to making war materials and ramped up productions.
d.
The U.S. government had no control over production and this led to a slower shift in making war materials.