Which of the following best states how Shays's Rebellion and the Pennsylvania Mutiny affected Congress? Congress feared the spread of future rebellions and anarchy. Congress feared the spread of slavery to Western territories. Congress feared the rejection of the union by states. Congress feared the creation of new, rebellious states.

The answer is Congress feared the spread of future rebellions and anarchy. They were barely able to stop these rebellions and it proved that the Articles of Confederation were not sufficient to govern the new country. What was needed was a new constitution where a stronger and more centralized government would able to enforce the laws on the land.