How did the issuing of this document change the nature of the Civil War? (5 points) Select one:
a. It prompted several states to secede from the Union and join the Confederacy.
X b. It abolished slavery and ensured freedom for millions of African Americans.
c. It altered the Union's purpose from restoring the nation to ending slavery.
d. It had little effect on either side since it was issued so close to the end of the war.