Final answer:
The American colonies were able to accomplish more in the last of the Frontier Wars due to increased colonial unity.
Step-by-step explanation:
The correct answer is c) there was more colonial unity in that war.
In the last of the Frontier Wars, known as the French and Indian War, the American colonies were able to accomplish more than in the previous two wars due to increased colonial unity. The colonies joined forces against the French and their Native American allies, forming the Albany Plan of Union in 1754. This marked the first attempt at colonial unity and laid the foundation for the eventual American Revolution.
With greater unity, the colonies were able to coordinate their efforts, share resources, and successfully confront the enemy. They also received support from British forces, both the army and the navy, but the key factor was the increased colonial unity.
Learn more about American colonies' success in the last of the Frontier Wars