Answer:
C
Explanation:
The process of movement of the body requires the assistance of muscles. Their contractions or otherwise create the necessary torques needed for bones to initiate movements. Energy is also needed for muscle contractions and the energy is generated through (aerobic) respiration.
Hence, the best argument in favor of movement would be student A claiming that the respiratory system brings in oxygen the body needs and the muscular system allows the body movement.
The correct option is C.