Final answer:
When falling into cold water and unable to get out, the recommended position to place your body in is to float on your back. Curling into a fetal position is not advised.
Step-by-step explanation:
When falling into cold water and unable to get out, the recommended position to place your body in is to float on your back (Option C).
This position helps to conserve energy and prevent heat loss, as well as keeping the airway clear and making it easier to breathe.
Curling into a fetal position (Option D) is not advised as it can lead to increased heat loss and difficulty in breathing.