Why was the battle of Gettysburg considered the beginning of the end for confederacy?

A) The confederacy could not handle fighting in the colder temperatures of the north, so all fighting had to stay in the south.

B) The Confederates suffered a huge loss of life and they lost hope that they would gain the support of foreign countries.

C) The Confederates had gain the support of England, but have lost too many weapons.

D) The north suffered mass casualties but gained the support of France.