With few exceptions, native american groups of north america would be

most accurately described as

(a) living in dense but isolated pockets throughout the continent

(b) elaborately developed social groups in centrally organized nationstates

(c) independent paternal-based social groups living in small seminomadic

populations

(d) sporadic with inconsistent development between tribes, lacking a

common linguistic base

(e) lacking dense population concentrations or highly developed social

life in the modern sense