Please help ill mark as brainlist !!!

what was the significance of the events in Appomattox Courthouse, VA?

A ) William Carney becomes the 1st African American to receive the medal of honor for his bravery at the battle.
B ) 1st major battle of the Civil War with high casualties
C ) Turing point of the war because the south would not try to invade the North again.
D ) Robert E. Lee surrenders to Ulysses S. Grant to officially end the Civil War.