Match the phase of deglutition with the correct events.
a. Initiated by stimulation of tactile receptors in the oropharynx.
b. Peristalsis moves bolus towards the stomach.
c. The lower esophageal sphincter relaxes.
d. Begins with elevation of the soft palate.
e. Food bolus forced towards the oropharynx.
f. Food bolus pushed by the tongue against the hard palate.