What Cultural Biases Entered into the Paleoanthropological Record Surrounding Homo

What cultural biases entered into the paleoanthropological record surrounding Homo habilis?

A) Assumption that tool-making was important to early human ancestors
B) Allowing only male paleoanthropologists to work with understanding and recreating the process of making early tools
C) Assumption that men,women,and children lived as a family in society
D) Assumption that women were gatherers and provided most of the daily caloric intake,while men stayed at home caring for the young
E) Assumption that among our earliest ancestors the women stayed at home tending young and the men were hunters