What is significant about April 12, 1861?

On April 12, 1861, the first salvos of the American Civil War were fired with the bombardment of Fort Sumter, situated in Charleston harbor, South Carolina, by Confederate guns. Unable to reply effectively the commanding officer, Major Anderson, surrendered on April 13.

Explanation:

The Battle of Fort Sumter, in South Carolina, started. That was the start of the civil war.

Explanation:

Learned in history class.

deists, human beings can know god only via reason and the observation of nature, but not by revelation or by supernatural manifestations

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option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: