The correct answer is D) zero.
The bombardment of Fort Sumter resulted in zero deaths.
On April 10, 1861, the Confederated troops under the command of General Beauregard, were about to occupy Fort Sumter, in Charleston, South Carolina. So on April 12, the Confederate troops opened fire and the Union Army had to surrender. That incident represented the beginning of the United States Civil War. In that first confrontation, there were no casualties.