The correct answer is C) there was no federal standing army.
Shays' Rebellion showed this problem about the Articles of the Confederation: there was no federal standing army.
Former soldiers that participated in the Revolutionary War rebelled in the territories of Massachusetts through a series of attacks to public property in the early days of 1786. This was known as the Shays' Rebellion because it was led by Daniel Shay, a former soldier. These attacks to public buildings such as cour houses and government buildings led to a full confrontation with the military in 1787. The reason for the rebellion was that farmers had not received the proper federal help after the Revolutionary War. One of the problems that Shays' Rebellion showed about the Articles of the Confederation was that there was no federal standing army.