What was the Songhai Empire known to do? A. preserve the Islamic influence

B. bridge the Sahara Desert and the Atlantic Ocean

C. build relationships with North African countries

D. bring peace to the African nations

the authority to tax.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.