C elect the letter of the correct answer.
The Article talks mainly about
A
the ancient empire of Wagadugu, which became the richest empire in the western
Sudan region
B
the ancient empire of Wagadugu, which was invaded and swallowed up by the Mali
Empire
C
the reasons why camel caravans ran trade routes and the gold mines near the Sahara
Desert
D
the reasons why camels were put to work and the fact that their nostrils can keep out
sand