What caused the formation of the confederate states of america a, shermans march to sea b. the emancipation proclamation c. the firing on fort sumter d, the electiom of abraham lincoln

The election of Abraham Lincoln is the answer. Fort Sumter, however, was the first battle of the American Civil War. It can't be A, because Sherman's March was in 1864. The Emancipation Proclamation was in 1863, so that can't be the answer. The was had already started.

Exposition : comprehensive description and explanation of a theoryso the one that best describe it would be : d. writing which explains information by using things such as definitions, compare - and - contrast, and cause-and-effect