What are the authors qualifications to write the information in Minnesota in the 1870s

What event ensured england safe passage to colonize north america? a) many englishmen desired more religious freedom than the king allowed.b) england's government decided to take advantage of america's wealth of resources.c) england's defeat of the spanish armada in 1588 opened up the seaways.d) cabot claimed the north atlantic coast for england in 1497.

What was the overall impact of eli whitneys introduction of interchangeable parts?

What change took place in the african slave trade in the 1500's?