Why was a national law against slavery needed even though the emancipation proclamation had been issued?

The correct answer is C. The proclamation only applied to the Confederacy

Explanation:

The Emancipation Proclamation was approved in 1863, and through this, President Lincoln ordered slaves needed to be freed in the Confederacy states, which were Southern states in rebellion. This caused slaves to be freed in areas were the Union (Northern states) had control; however, slavery continued in areas in the rebel states and some border areas. Because of this, in 1865, the Thirteenth Amendment to the Constitution was ratified, and through this slavery was officially abolished in all the states of the United States. Thus, a national law was needed because " The proclamation only applied to the Confederacy."

answer; ///i do believe that the correct answer is (d); ///athens had a small population;

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.