how does the masticatory-functional hypothesis explain the observed craniofacial changes in conjunction with the shift to agriculture? a. the grit in agricultural foods resulted in higher rates of tooth wear, and the craniofacial bones had to compensate. b. agriculture caused populations to move more, and new populations with different-shaped heads moved into different areas. c. as individuals consumed softer foods, this reduced the size of the chewing muscles, which led to changes in the underlying bone. d. consumption of agricultural foods caused brain size to increase, which led to various craniofacial changes.