To What Does the Advent of Behavioral Modernity Refer

To what does the advent of behavioral modernity refer?

A) when hominids became hominins
B) the beginning of life beyond the forest and in the open grasslands
C) when early anatomically modern humans began to manipulate fire
D) when early anatomically modern humans became fully human in behavior (relying on symbolic thought and elaborating cultural creativity) as well as in anatomy
E) the beginning of a truly civilized and sedentary life, achieved about 10,000 years ago