What Is the Binford-Flannery Model for the Development of Food

What is the Binford-Flannery model for the development of food production?

A) People used domestication to replicate their previous diets in suboptimal regions.
B) There was an economic incentive for food production, because it could be sold to neighboring peoples.
C) Food production creates adequate nutrition with less work than hunting and gathering.
D) People had to respond to rapid and drastic environmental change at the end of the Paleolithic.