I think the answer is A, but im not 100% positive
please dont be angry if its wrong.
I hope this helps you! :D
I wanna say its industrsy but im not too sure, im sorry!
The Americans used their currency in exchange for goods and services. As the American currency and economy evolved, they started to expand what they can use their money for. Hoped this helps! ^-^
Answer: They hoped to stay out of the war.