There were many important results of the Civil War. Which do you think was the most important, and why? PLS HELPP :))

The Battle of Gettysburg, fought from July 1 to July 3, 1863, is considered the most important engagement of the Civil War. After a great victory over Union forces at Chancellorsville, General Robert E. Lee marched his Army of Northern Virginia into Pennsylvania in late June 1863.

Ibelieve the correct answer is d.

Forced the british to retreat