Answer:
In the United States, voting poll taxes (whose payment was a precondition to voting in an election) have been used to disenfranchise impoverished and minority voters (especially under Reconstruction).
C. The earliest ancestors of humans lived in Africa.
The answer is that it is b because
Tropical rainforest, the high mountains and wild rivers were some of the physical obstacles that the Incas faced. They had to build a complex network of roads to link the entire Inca empire. They had messenger stations along these roads so that they could relay their messages, and they built shelters along the way for travelers.
