How did people in the early for north america survive

Which of harriet martineau’s books is a foundational treatise on sociological data collection?

How did settlers decide where to live ?

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.