During the Civil War, President () issued the Emancipation Proclamation, which declared the abolition of slavery.

A. the cold weather in the north was not suitable for Negro slaves
B. Negro slaves could not cope with machines in factories in the north
C. Negro slaves were best suited for the kind of plantation economy in the south
D. the north world did not allow slavery to spread into their states

A. he made a speech at Gettysburg
B. General Lee, commanding general of the Confederate army surrendered his troops
C. the adoption of the thirteenth Amendment
D. a military victory of the Union force at Gettysburg