Respuesta :
Ohio.
Ohio never had slavery because it was created according to the Northwest Ordinance as a state that is slave free. The other three had slaves and Texas even had them during the war since they didn't participate in it and they found a loophole in the Emancipation proclamation to keep having slaves.
btw shoutout to my Maryland people lol.
Answer:
Ohio
Explanation:
Ohio was a Union state that did not allow slavery within its territories.
Maryland, Missouri, and Texas all allowed slavery, and found it to be very important to their societies and economies.
Ohio was created with the Northwest Ordinance of 1787.
This ordinance outlawed slavery in all of the states in the Northwest Territory, which Ohio was a part of.
So, the correct answer is Ohio.