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

Which is not a claim kennedy made? a. the fact that communist cuba is so close to american soil is one reason we need to accelerate our space program. b. his decision to shift the study of space to one of the highest american priorities was one of his most important decisions as president. c. within these last months at least 45 satellites have circled the earth. (i think it's this one) d. the mariner spacecraft now on its way to venus is the most intricate instrument in the history of space science. i need this answer really quick, so .