They just cross the borders like others
D. Cuneiform. This is the earliest known writing system.
The answer is C hope this helps
The most important reason was economical: slavery was profitable for slave owners in the South, and they were against its abolishing. The southern plantations were very work -intensive, so a lot of work was needed and slave labour was a very cheap source of labour that the owners didn't want to give up upon.
the correct answer is <span>B. The Southern plantation economy depended on slavery. </span>
