The Emancipation Proclamation, by implication, extended which of the following offers to Confederate states?
||They could keep their slaves if they abandoned the Confederacy and rejoined the Union.
||The war would continue until they freed their slaves.
||The Union would pay them for their slaves if they would agree to free them.
||The Union would surrender if they agreed to free their slaves.
||The Confederacy could exist as an independent nation if it would build an impregnable border between its territory and that of the United States.