Observe the picture. Which system(s) of the boy's body is/are involved in helping him to escape?
| (d) | Skeletal system | (e) | Muscular system |
| (f) | Circulatory system | (g) | Respiratory system |
(A) (d) only
(B) (d) and (e)
(C) (d), (e) and (f)
(D) (d), (e), (f) and (g)