Best answer is
B) Berlin Airlift
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 to this is: GIS (geographic information system)
Trade helped develop the Renaissance culture. Italy was one of the main benefiters of trade. When Italy failed to develop a centralized monarchial state, five states dominated peninsula. Italy has economic power leading to crucial roles in politics and culture. Society was broken down three social classes: the religious clergy, the nobility, and the peasants and serfs