Which of the following did congress attempt in the mid-1800s? establishing a balance of free and slave states creating more free states than slave states creating more slave states than free states forming new political parties to address slavery

establishing a balance of free and slave states

a is the correct answer

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.

this is a false claim the emancipation proclamtion freed all slaves in the rebillion states