Why were mosques originally built in the ghana empire
a) for the common people, who were mostly muslim
b) for the king, who was a muslim
c) for the muslim merchants and visitors
d) for the invading muslim armies, who forced the residents to build them

C) for the Muslim merchants and visitors

Explanation:

The capital of the Ghana empire must have been Cumbi-Salé, on the edge of the Sahara desert. According to the description of the city left by Albacri in 1067, the capital was actually two cities six miles away, but "between these two cities there are dwellings," so one could say that they merged into one only city.

According to the Albacri, a part of the city was called Gaba. The name of the other part of the city is not registered, but it is known that it was surrounded by wells with fresh water, where vegetables were grown and inhabited almost entirely by Berber Arabs and Muslims, along with twelve mosques, one of which was designated to the prayers of Friday, possessing a large group of Islamic scholars, scribes and jurists. Due to the fact that most of these Muslims are merchant, this part of the city was probably their main business area.