Upon Activation by Stomach Acidity, the Secretions of the Parietal

Upon activation by stomach acidity, the secretions of the parietal cells ________.

A) initiate the chemical digestion of protein in the stomach
B) initiate the mechanical digestion of lipids in the stomach
C) initiate the chemical digestion of lipids in the stomach
D) include pepsinogen
E) delay digestion until the food arrives in the small intestine