The correct answer is: A) British General Cornwallis and his troops were cut off from supplies, reinforcements, and escape routes, leading to the surrender of the British forces.
Geography played a crucial role in the outcome of the Battle of Yorktown by making it difficult for British General Cornwallis and his troops to access supplies and reinforcements. The location of Yorktown, situated on a peninsula surrounded by water, limited escape routes and made it easier for the combined French and American forces to surround and besiege the British. This ultimately resulted in the surrender of the British forces in October 1781, marking a decisive victory for the American colonies during the Revolutionary War.