Answer: Choice C
Step-by-step explanation:
The fact that the states had to unanimously agree to change the Articles of Confederation meant that it would be very hard to make updates to address the weaknesses of the government. The national government was very weak. There was no president and no Supreme Court to settle important arguments. The states looked upon themselves as separate countries. To change the Articles of Confederation they had to meet, which they did in Philadelphia in 1787.