Which of the following was the scene of a substantial british victory in the final phase (1778–1781) of the american revolution?
a. yorktown
b. saratoga
c. charleston
d. cowpens

c. Charleston

Explanation:

The siege of charleston was one of the worst American defeats of the war, it took place March 29 to May 12, 1780. After six weeks of fighting the british profited from their focus in southern colonies and Gen B. Lincoln surrendered to enemy forces.

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