Some sociologists argue that the collapse of the Easter Islanders civilization was self-inflicted, ----.
A) because over five hundred years of exposure to disease and violence wiped out the vast majority of this indigenous population
B) on account of the fact that they ruined their own local habitat
C) even though many tribes and groups adopt highly permissive attitudes towards children
D) therefore the tribal peoples there have experienced genocide on a huge scale, and the loss of much of their land
E) while many of the practices of tribal cultures can help us to rediscover our way