To answer this question, we need to have knowledge about the events that took place during the American Revolutionary War.
Option A) Cornwallis - This option is correct. General Charles Cornwallis was surrendered at Yorktown in 1781. The Battle of Yorktown was a decisive victory for the American forces, led by General George Washington, and the French forces, led by General Rochambeau. Cornwallis was the British commander-in-chief at that time, and his surrender marked a significant turning point in the war.
Option B) Vinegar - This option is incorrect. Vinegar is not a person and has no relevance to the events at Yorktown in 1781.
Option C) Snake Gully - This option is incorrect. Snake Gully is not a person and has no relevance to the events at Yorktown in 1781.
Option D) George Washington - This option is incorrect. While George Washington played a crucial role in the American Revolutionary War as the commander-in-chief of the Continental Army, he was not the one who surrendered at Yorktown. It was General Cornwallis who surrendered to Washington.
The correct answer is Option A) Cornwallis because he was the British commander-in-chief who surrendered at Yorktown in 1781, during the American Revolutionary War.