American Victory at Yorktown Was Complete Only After

American victory at Yorktown was complete only after

A) Washington led his troops across the Delaware River in the dark of night.
B) Washington led a courageous and unexpected charge against the rear unit of the British.
C) American spies captured the British General Cornwallis.
D) General Cornwallis got killed in battle.
E) the French naval fleet arrived before the British could rescue Cornwallis's army.