Final answer:
Supination of the foot involves inversion (moving the soles inward), adduction (moving towards the midline), and plantar flexion (pointing the toes). Therefore, the correct combination of movements that comprises supination of the foot is C. Inversion, adduction, and plantar flexion.
Step-by-step explanation:
The motion of supination of the foot is a combination of several distinct movements. Specifically, supination involves the soles of the feet moving inward, toward the midline of the body, which is known as inversion. It also commonly entails lifting the heel and pointing the toes, known as plantar flexion.
Additionally, for the foot to fully supinate, it may also involve some degree of adduction, which is the movement of a limb or hand toward the midline of the body or across the midline.
Given this information, the correct answer to the question 'Which of the following motions comprises supination of the foot?' is C. Inversion, adduction, and plantar flexion.