Im not 100% this is right,but B.system of federalism
Answer:
Beginning in 1781, the government of the United States operated under the Articles of Confederation. The Articles created a unicameral legislature, called Congress, without a separate executive and judicial branch. Under the Articles of Confederation, Congress had the power to create money and post offices.
Explanation:
Mathematics, mostly.
They also did groundbreaking work in the following fields:
Astronomy
Philosophy
Geography
Sciences
Technology
Trade agreements between which two countries? In general, trade agreements are intended to improve the economy of both nations who agree to the new trade rules.
The government really hurt the business that were present during this period
