Select the Correct Statement About the Regulation of Gastric Secretion

Select the correct statement about the regulation of gastric secretion.

A) Gastric secretion can be stimulated before food has entered the mouth.
B) Gastric secretion is enhanced by very low pH (below a pH of 2) .
C) The presence of food in the stomach prevents hormonal control of gastric secretion.
D) Vagus stimulation of the stomach results in decreased secretion of gastric juice.