I would assume the second and last answer choices are correct
The battle of Gettysburg is considered to be the turning point of the Civil War because, prior to this battle, the South had been beating the North relentlessly. Gettysburg was a victory to the North and Southern morale was damaged by the battle more than by any other before it. Additionally, it was the second time that Lee had failed to invade Pennsylvania.
I got the answer from http://www.answers.com/Q/Why_was_the_battle_of_Gettysburg_called_the%27%27_turning_point_of_the_Civil_War%27%27
Make sure you use your own words in your assignment! Hope this helps!
Joseph Goldhagens article on the holocaust. You could read a memoir of an SS officer called the death dealer the ss officer was the commander of aushwitz