Final answer:
The Battle of Gettysburg resulted in the Confederate army never again attempting to invade the North, marking a significant turn of the tide of the war in favor of the Union.
Step-by-step explanation:
One of the key results of the Battle of Gettysburg was that it marked the last time General Robert E. Lee attempted to invade the North. This battle, the bloodiest of the American Civil War with enormous casualties on both sides, ended Lee's offensive strategy into Union territory. The Confederate army's defeat also turned the tide of the war in favor of the Union, as it occurred alongside the Union's capture of Vicksburg, which was another significant blow to the Confederacy. Therefore, the correct answer to the question is B. The Confederate army never went north again.