The correct answer is C) Egypt.
Mali, Songhai, and Ghan were kingdoms in the Sahel region. Egypt was not.
The Sahel region is part of the Northcentral and Western part region of the Africa continent. It goes from Sudan to Senegal. It divides the Sahara Desert to the Savannas in the south region. It is a desertic and semi-arid zone. Egypt is located in the Northeast of Africa, very close to the Middle East territories, just divided by the Sinai Peninsula.