Why were the arabs able to conquer much of persia and parts of byzantium

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.

The delegates of the second continental congress who were ready to declare independence were from which area? a. new england b. the southern colonies c. quebec d. the middle colonies

2. what was the dred scott decision about? what do we learn from this supreme court case?