The map of Mississippian Indian settlement is most likely displaying which cultural characteristic prior to European contact?

Responses
A the official end of nomadic herdingthe official end of nomadic herding
B the establishment of long houses along primary riversthe establishment of long houses along primary rivers
C the creation of earthen mounds, known as earthwork moundsthe creation of earthen mounds, known as earthwork mounds
D the location of several water sources required for survivalthe location of several water sources required for survival

C the creation of earthen mounds, known as earthwork mounds.