In Contrast to Earlier Models, Current Explanations of the Origin

In contrast to earlier models, current explanations of the origin and decline of states

A) suggest that all cultural change results from the diffusion of ideas between societies.
B) consider the effects of social and political variables in addition to environmental factors.
C) attempt to isolate the single variable that brought about cultural change.
D) accept the possibility that extraterrestrial forces may have played a role in the rise and fall of ancient civilizations.
E) emphasize the role of natural environmental factors.