One of the main groups in the early 1800s to object morally to slavery was the A. Southern plantation owners
B. Quakers
C. New England merchants

B. Quakers

Explanation:

"Until the early 1800s, the Quakers in Pennsylvania were the main group that had raised questions about the moral issues of slavery."

From Odyessware. Copy and pasted directly.

I don't think the first person is right cause the south was the group that approved of slavery and wanted to spread it to the rest of the world. Plus slaves were considered "valuable" back then.

small european communities with shared traditions consolidated into large new states (apex)