I think the answer is letter a. David Wilmot.
It is because Wilmot was known as the instrument in establishing the Republican Party in Pennsylvania and a driving force in the formation of the Republican Party.
Answer: A. Several publications in the mid 1800s made the cruelties of slavery public in the north.
The Missouri Compromise of 1820, which allowed Missouri to become a slave state, further increased anti-slave sentiment in the Northern states. The abolitionist movement began as a more organized, radical and immediate attempt to end slavery than earlier movements.
He did not approve of slavery, he just didn't know how to end it
