Final answer:
The Annapolis Convention and Shays' Rebellion revealed the weaknesses of the existing government and highlighted the need for a stronger central government, leading to the calling of a constitutional convention.
Step-by-step explanation:
The Annapolis Convention and Shays' Rebellion likely led the Framers to call a constitutional convention because they revealed the weaknesses of the existing government and demonstrated the need for a stronger central government. Shays' Rebellion, in particular, showed the dangers of weak national authority and the potential for unrest and chaos. The Framers recognized that the Articles of Confederation were not sufficient to address these issues, prompting them to gather in Philadelphia to draft a new constitution that would establish a more powerful federal government.