What event ultimately ended the Civil War? A. Lincoln's delivery of his second inauguration speech B. Lee's surrender to Grant at Appomattox Courthouse C. Defeats at Gettysburg and Vicksburg D. General Sherman's destruction of Atlanta and Savannah

B

Explanation:

"General Robert E. Lee surrendered his Confederate troops to the Union's Ulysses S. Grant at Appomattox Court House, Virginia, marking the beginning of the end of the grinding four-year-long American Civil War" -history.com

a. by accepting the election of president abraham lincoln in 1860 and convincing other southern states to do the same