It can be inferred that Rosalind Miles refers to the third millennium B.C. primarily in order to A. present an overview of what the practice of history once entailed B. suggest that the origins of historical study are much earlier than had been previously though C. suggest why the third millennium B.C. has received so much attention from historians D. establish a contrast between men and women in terms of how long they have been recording history E. indicate how significantly the practice of history has changed since the third millennium B.C.