When Teaching a Patient About Esophageal Speech,which Technique Should the Nurse

When teaching a patient about esophageal speech,which technique should the nurse instruct the patient to use first?

A) Coordinate lip and tongue movements with produced sound.
B) Relax the diaphragm to allow air into the esophagus.
C) Cough to express air.
D) Swallow air and force it back up through the esophagus.