Why did American Colonists attack the city of Savannah in 1779? AKS 33c

Question

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4 points
The colonists had promised to return land surrounding the city to their American Indian allies.
Capturing the city would force the British to retreat south, where they would face the Spanish military.
The city was the last British stronghold in the colonies, and its capture would end the American Revolution.
Controlling the major port city would prevent Great Britain from receiving supplies it needed for its military.

Answer 1

The correct answer is: Capturing the city would force the British to retreat south, where they would face the Spanish military.