Why Was the 1807 Federal Slavery Law Unsatisfying for Everyone

Why was the 1807 federal slavery law unsatisfying for everyone?

A) On the one hand, slave owners felt it threatened their livelihood, but on the other hand, abolitionists felt it did little to end slavery.
B) It did nothing to affect slavery or the slave trade in the U.S. and only frustrated relations with European allies.
C) On the one hand it appeased anti-slavery European allies, but on the other hand it frustrated U.S. slave owners.
D) It only granted African Americans freedom, not any voting or civil rights, yet it infuriated their slave owners.
E) It appeased southern slave owners, but infuriated northern abolitionists.