Answer:
B
Explanation:
Banks themselves don't print currency so A is out.
Exchanging gold for paper currency does not create new money, it is just equal exchange so C is out.
Lending more money than they are required to hold in the reserve is incorrect because that money already existed and was in the bank's possession so D is out.
The only answer that fits both conditions is B
this should help
https://spartacus-educational.com/U3Ahistory17.htm
After the fall/decline of the Roman empire, Europe went through a period of time known as the Dark Ages.
The answer is NAFTA hope that helps