The correct answer is C. on.
Option A, inside, is incorrect because George Washington did not ride in a vehicle during the American Revolution. He rode on horseback.
Option B, alongside, is incorrect because George Washington was not a passenger on a vehicle during the American Revolution. He was the commander-in-chief of the Continental Army and rode his own horse.
Option D, none of the above, is incorrect because one of your ancestors rode on George Washington’s horse during the American Revolution.
I hope this helps! Let me know if you have any other questions.