Which Intervention Would Be Most Helpful in Preventing Barotrauma When

Which intervention would be most helpful in preventing barotrauma when ventilating a 3-year-old girl with a bag-valve-mask?

A) Choosing the correct size bag and face mask
B) Setting the flow rate at exactly 10 L/minute
C) Maintaining the airway in the open position
D) Delivering one breath every 3 to 5 seconds