For almost five thousand years after its beginning 2.5 million years ago, Homo habilis roamed the earth, lived in semi-permanent camps, gathered food and shared their economy.

A. For almost five thousand years after its beginning 2.5 million years ago,
B. Beginning 2.5 million years ago for a period of almost five thousand years,
C. Beginning a period of almost five thousand years 2.5 million years ago,
D. During five thousand years, a period beginning 2.5 million years ago,
E. Over a period of five thousand years beginning 2.5 million years ago,