Why was americas victory at yorktown among the most significant battles of the american revolution?

(a.) it made the british realize they were fighting a lost cause
(b.) it forced colonists who had so far remained neutral pick a side in the war
(c.) it the continental army remove all british barracks from new jersey
(d.) it secure france’s military and financial aid for the american cause
(e.) it was the colonists’ first victory against the british during the revolution