Question

what may have led many americans believe that indians had always been simple savages incapable of constructing the great mounds and other ruins of past civilizations? (p. 4)
the effort to drive indians west of the mississippi and onto smaller reservations in the 1830s and 1840s
the discovery of evidence of medieval european settlers in america like king madoc of wales and his people by scholars in the 1790s
the rise of slavery in america by the civil war, leading all whites to believe themselves superior to other
aces.\
the second great awakening in the early 1800s that led many americans to believe non-christians irrelevant in matters of civilization
clear selection

Explanation:

This belief was tied to the political and social push to displace Indigenous peoples. Forcing Indians west onto reservations in the 1830s-1840s required justifying the action by framing Indigenous groups as "uncivilized" and incapable of creating the complex mound-building civilizations, which helped legitimize taking their land and erasing their cultural history. The other options are incorrect: there was no credible evidence of Medieval European settlers building these mounds; the rise of slavery's racial hierarchies was not the direct driver of this specific mound-related myth; and the Second Great Awakening focused on religious revival, not this specific racialized claim about mound construction.

Answer:

A. The effort to drive Indians west of the Mississippi and onto smaller reservations in the 1830s and 1840s