If Peristalsis in the Oesophagus Is Insufficient to Carry an Especially

If peristalsis in the oesophagus is insufficient to carry an especially large bolus of food through the oesophagus to the stomach, what happens to dislodge this trapped food

A) A secondary peristaltic wave is initiated by the swallowing centre.
B) A secondary peristaltic wave is initiated by distention of the oesophagus, mediated by the intrinsic nerve plexuses.
C) The food remains in the oesophagus until the swallowing mechanism is voluntarily initiated once again.
D) Increased oesophageal mucus secretion occurs to lubricate the stuck bolus so that it can slide to the stomach.