An egg-eating snake carefully retracts its teeth and engulfs a bird egg whole.Once it has completely closed its mouth,it can then break the eggshell internally and let the liquid contents move down the digestive tract.To avoid having the sharp pieces of eggshell proceed to the stomach,it must regurgitate them before they pass the
A)digest proteins. B)digest carbohydrates. C)transport food from the small intestine to the large intestine. D)transport food from the mouth to the stomach. E)transport food from the stomach to the large intestine.