Northerners Struggled with the Issue of Ending the Slave Trade

Northerners struggled with the issue of ending the slave trade because________ .

A) the three-fifths clause had worked to their favor in several past elections
B) they could not figure out how to deal with black people who were captured by customs agents
C) they believed states should regulate it, wanting to keep out of the debate
D) it provided needed tax money to the federal government
E) they wanted to abolish slavery completely instead