_Shay's Rebellion suggests that the most important problem facing the United States after the Revolution was
a. The ongoing conflict with Native Americans
b. The British refusal to recognize American claims to the Northwest Territory
c. Economic problems caused by debt and high tax
d. Disputes over states' rights and the authority of the federal government
e. The danger of an open slave revolt in the South

C.) Economic problems caused by debt and high tax

Explanation: Shays’ Rebellion was a series of armed protests staged in 1786 by farmers in western Massachusetts against repressive debt and property tax collection practices.

The farmers were aggrieved by excessive Massachusetts property taxes and penalties ranging from the foreclosure of their farms to lengthy prison terms.

Led by Revolutionary War veteran Daniel Shays, the rebels stormed several courthouses in an effort to block tax collections.

Shays’ Rebellion was put down on January 25, 1787, when a private army raised by Massachusetts’s Governor, James Bowdoin intercepted and defeated and arrested Shays and nearly 1500 of his followers as they attempted to seize the federal arsenal in Springfield, Missouri.

Shays’ Rebellion underscored weaknesses in the Articles of Confederation and led to the creation of the U.S. Constitution.