The answer is A. atlantic ocean
Answer:
Spain brought African Americans for slave labor. While Native Americans were forced to be suppressed and living in fear of men killing them with stick that shoot fire, and diseases they hadn't built an immune system for
Geographically it was surrounded by three sides and was between Europe and Asia.
It also benefited a lot from the linked trade routes in both sea and land.
The native cultures of North America could not be preserved as they were originally, first by the wars that the colonists and then the Americans, held against them; then, when their lands were bought, and the tribes moved to Indian reservations, their native land and their ancestral forms of life were changed or finished; then, being unable to live on the hunt, and losing the lands that were before them, they had to have modern jobs, to leave some traditions, to change their way of life; and in addition to this, some have adopted customs, ideas, or the religion of the Americans.