What factors are important in determining the level of hypoxemia that the child may have experienced during the submersion? Select all that apply.

Rationale: A. Oxygen concentration in the air affects the available oxygen for breathing during submersion. B. While witnessing the fall is important for response time, it doesn’t directly affect the level of hypoxemia. C. Water temperature impacts the body's response to submersion, affecting oxygen utilization. D. The duration of submersion directly correlates with the level of hypoxemia.