Which of the Following Events Would Have to Occur to Allow

Multiple Choice

Which of the following events would have to occur to allow the bolus of food to go from the region labeled E in the diagram to the region labeled F?

A) The nasopharynx would have to contract to compress the bolus into F.
B) The epiglottis would move out of the way to allow the bolus to enter F.
C) The cardiac sphincter would have to relax.
D) The upper esophageal sphincter would have to relax.
E) None of these events have to occur.