Final answer:
The Battle of Yorktown was a decisive American victory with the help of the French, leading to the surrender of General Cornwallis. This victory marked a turning point in the American Revolution. OPTION a is correct
Step-by-step explanation:
The significance of the Battle of Yorktown was that it was a decisive American victory with the assistance of the French. In 1781, General Cornwallis of the British army was surrounded by over 9,500 American and 7,800 French forces at Yorktown, leading to his surrender.
This victory was crucial in ending the American Revolution as it demonstrated the strength of the American forces and their ability to secure foreign assistance.
OPTION a is correct