After Initiating B-CPAP in an Infant at 6 Cm H₂O,the

After initiating B-CPAP in an infant at 6 cm H₂O,the therapist notices that,although "bubbling" is present,the pressure in the manometer fluctuates between 2 and 5 cm H₂O.What may have caused this situation?

A) The Fio₂ was not increased sufficiently.
B) The CPAP level was not raised enough.
C) The flow through the CPAP system is too low.
D) A problem with the interface has likely developed.