Answer:
Northern and Eastern Migrations: people from the upper Nile area and southwest Asia. These people became traders, and established the D'mt Kingdom.
Bantu Migrations: Bantu-speaking peoples left their homeland in the Niger River valley. Bantu's were farmers and they spread south and east.
Explanation:
All of them are necessary
W H E E Z E
I don't know is the glass half full or half empty?
It's really a matter of perspective XD