Maintaining an Open Glottis During Coughing (As with the FET)

Maintaining an open glottis during coughing (as with the FET) can help to minimize increases in pleural pressure and lessen the likelihood of bronchiolar collapse. Which of the following techniques can aid the practitioner in teaching the patient this maneuver?

A) Having the patient inhale slowly through the nose
B) Having the patient phonate or "huff" during expiration
C) Having the patient "tense" the neck muscles while coughing
D) Telling the patient to exert effort, as in straining at stool