5. Gastrointestinal motility includes which causes and , which causes . A. Segmentation waves; food to move backward and forward; peristalsis; food to move along the tract distally. B. Peristalsis waves; food to move backward and forward; segmentation; food to move along the tract distally. C. Rippling waves; food to move backward and forward; segmentation; food to move along the tract distally. D. Propulsion waves food to move backward and forward; peristalsis; food to move along the tract distally. E. None of the above