What Benefit Did Abraham Lincoln See in Having Andrew Johnson

What benefit did Abraham Lincoln see in having Andrew Johnson on his ticket?

A) He was an inspiration to working-class people in poverty.
B) As a former slaveholder, he demonstrated that one could live without slaves.
C) He was one of many southern senators from a state that seceded who refused to leave the U.S. Senate.
D) Lincoln's party hoped to build a Republican base in the South.
E) Tennessee was Lincoln's favorite southern state because he was born there.