Question: During the Aurignacian Period (45-30 thousand years ago) and he Magdalenian Period (17-15 thousand years ago), intricate cave painting and engravings were created. What primary biological trait need to develop immediately prior to these periods in AMHS to do so? a. Bipedal locomotion b. Dexterity of the digits c. Grasping hands and feet d. Brain complexity. Need Assignment Help?