Your answer would be x=16
Niger and Congo are two rivers after which countries are named (actually in both cases two countries each) - and those are African countries, so they must be in Africa.
Zambezi is a river in Angola and Namibia.
Tigris is a River in Mesopotamia, in Asia - so that's the correct answer!
The answer I believe would be D) 75 - 79.
Hope this helps.
A because it’s based on the environment and the society
