In Teaching a Patient to Perform the Sustained Maximal Inspiration

In teaching a patient to perform the sustained maximal inspiration maneuver during incentive spirometry, what would you say?

A) "Exhale normally, then inhale as deeply as you can, then hold your breath for 5 to 10 seconds."
B) "Inhale as deeply as you can, then blow out as much air as you can as fast as possible."
C) "Exhale normally, then inhale as deeply as you can, then hold your breath for 10 to 20 seconds."
D) "Exhale as much as you can, then inhale as deeply as you can, then relax and let it out."