How Did the British Have to Change Their Military Strategy

How did the British have to change their military strategy after France entered the war on the American side?

A) With their naval superiority no longer guaranteed, the British launched an all-out land war in the South.
B) The British immediately attacked Washington´s army at Philadelphia, to weaken the Americans as much as possible before French troops and supplies arrived.
C) The British leaned more heavily on their Indian allies to harass the colonists.
D) With the seas now no longer under their complete control, the British shifted their focus to the frontier.
E) No longer able to depend on their naval superiority, the British shortened their supply lines by evacuating Philadelphia and escaping to New York.