What document announced freedom for the slaves in all of the confederate states? declaration of human rights articles of agreement emancipation proclamation morrill act

The correct answer is: "Emancipation Proclamation"

Initially, the civil war between the North and the South was waged by the North to prevent the secession of the South and preserve the Union. Ending slavery was not one of the objectives. This changed on September 22, 1862, when President Abraham Lincoln issued a preliminary version of the Proclamation of Emancipation in which he declared that as of January 1, 1863 slaves in those states or parts of the states still in rebellion would be free One hundred days later, Lincoln issued the Emancipation Proclamation declaring that "all persons held as slaves" in the rebel zones "are, and will henceforth be, free."

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.

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