The Emancipation Proclamation issued by President Lincoln A (triggered the start of the Civil War)
B (was supported by both Northern and Southern states.)
C (freed all enslaved people under Confederate control.)
D (was prompted by the Dred Scott decision.)

C

Explanation:

A is not correct because the Emancipation Proclamation was issued after the beginning of the Civil War in the year 1863. B is incorrect because the Emancipation Proclamation was not supported by those in the South. D would not be correct because the Dred Scott decsion was not a factor in issuing the Emancipation Proclamation. Also, that court case happened in 1857, which was 4 years before the Civil War began. C would be correct because it stated that slaves living in Confederate states would be technically free.

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