Final answer:
The Thirteenth Amendment abolishing slavery is NOT a cause of The Civil War.
Step-by-step explanation:
The option that is NOT a cause of The Civil War is the C. Thirteenth amendment abolishes slavery. The Thirteenth Amendment was actually passed after the Civil War, in 1865, and it abolished slavery in the United States. The causes of the Civil War include the Confederate troops firing at Fort Sumter, the election of Abraham Lincoln, and the Compromise of 1850.
Learn more about The causes of The Civil War