West African empires were incredibly wealthy because... A. They sold enemies into slavery to the Europeans.
B. They sacrificed thousands of peasants to the gods every year.
C. They had gold and other valuable minerals in their region.
D. They control the access routes of the Trans-Saharan trade network.

C

Explanation:

The Africans had gold. They would also trade salt for gold because they needed salt to live

answer: what was the us involvement in ww1? although the u.s. tried to remain neutral when ww1 broke out, it finally joined on april 6, 1917 after declaring war on germany. the reason for america to become involved in ww1 was germany's unrestricted submarine warfare, which had already sunk several american merchant ships.

explanation:

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.