After General Charles Cornwallis Achieved the Upper Hand in Virginia,the

After General Charles Cornwallis achieved the upper hand in Virginia,the balance of power on the battlefield changed dramatically because

A) Washington had better information about Cornwallis's position.
B) the French gave military support to Washington.
C) the British had strong positions in the North and South.
D) Cornwallis had momentum in his favor after a string of losses.