2. The Emancipation Proclamation was an order from Lincoln

granting slaves U. S. citizenship.

requiring slaves to join Union troops.

calling for all Confederate slaves to be freed.

ending slavery in the United States.

The answer is number 3: Calling for all Confederate slaves to be freed.

The Emancipation Proclamation, issued on January 1, 1863, was an executive order from the President to emancipate all the slaves in the states that hadn't ended its rebellion against the Union, that is to say, the Confederate states.

" ( ...) all persons held as slaves within any State or designated part of a State the people whereof shall then be in rebellion against the United States shall be then, thenceforward, and forever free"

The correct answer is C. Calling for all Confederate slaves to be freed.

Explanation

September 22, 1862, is a historic date for the United States because on that day President Abraham Lincoln issued a preliminary version of the Emancipation Proclamation to declare that slaves who were in the rebellious states or states of the confederation would be free from January 1, 1863. This declaration of emancipation was a measure that President Lincoln took as an incentive for Confederate slaves to support the cause of the Union. This proclamation was applied only in states that had separated from the Union and had left slavery intact in the border states. So the correct answer is C. Calling all Confederate slaves to be freed. So, the correct answer is C. Calling for all Confederate slaves to be freed.