Which ancient civilization was the first to use city planning and sewer systems?

Which of the following led to a continuation of the treatment in the excerpt above? a)the brutality of the trans-atlantic african slave trade. b)spanish repression after violent native uprisings in new spain during the 16th century. c)european competition to quickly establish colonial holdings in the new world. d)the reliance of the spanish on native americans to provide labor under the encomienda system.

Classify the most significant contributions of the two major indian empires to world culture

What was the purpose of the federal reserve system