The clovis tradition, a sophisticated stone technology based on a sharp point that was fastened to the end of a hunting spear, flourished (widely but briefly) in the central plains and in what is now the eastern united states. until recently, the clovis people were considered the first settlers of the americas. recent research now suggests, however, that

It will in all probability the Americas were settled by a few homesteaders who came at various circumstances, maybe by various courses and had diverse constitutions and hereditary markers, which keep on being found and faced off regarding. 
The Clovis culture takes its name from the town in New Mexico, where the striking stone shot point normal for the convention was first found. Its particular qualities incorporate a focal furrow, or woodwind, along both of its countenances and finely worked edges.

the answer is option d (ordinary people should be able to pursue greater opportunities)