which geographic condition contributed to the defeat of napoleon's troops during the invasion of russia

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.

a and b!

dfroos means which is a and b

is it multiple choice