The authority of King George III was challenged by the formation of continental congress.
Answer: c. the formation of the Continental Congress
Explanation:
The present day United states was formed from 13 British colony states. The continental congress was formed during the period of American revolution. It was formed as a body to raise voice against the unfair laws passes by the British.
King George III was the British king during the American revolution. The congress that met in 1774 is called the First continental congress and the one that met between 1775 and 1781 is called the second continental congress. The collective efforts of the continental congress finally resulted in the freedom of thirteen states from Britain.