Respuesta :
Civil War would be the war between the North and South, and since Confederates attacked Union forces to start the war.... the answer would have to be A: the attack at Fort Sumter. (A)
Answer: A. the attack at Fort Sumter.
The battle of Fort Sumter began on April 12, 1861, when Confederate forces fired on the Union garrison. These are considered the first shots of the war, and therefore, the event directly led to the outbreak of the Civil War. The other events listed in the options are likely to have contributed to the Civil War. However, they did not directly led to it.