Why were mosques originally built in the ghana empire?

for the common people, who were mostly muslim

for the king, who was a muslim

for the muslim merchants and visitors

for the invading muslim armies, who forced the residents to build them

The right answer for the question that is being asked and shown above is that: "for the invading Muslim armies, who forced the residents to build them." mosques originally built in the Ghana Empire because for the invading Muslim armies, who forced the residents to build them

The answer to the question is a.