During a videofluoroscopic swallow study, an adult patient with dysphagia due to stroke exhibited pyriform sinuses after the swallow due to short duration of upper esophageal sphincter (UES) opening. The instructed patient to perform a chin-down posture while observing the videofluoroscopic image.
A. Increased UES opening on the subsequent swallow.
B. Aspiration from the pyriform sinus.
C. Increased tongue base retraction on the subsequent swallow.
D. Reduction in oral containment of the subsequent bolus.