Which of the Following Statements Regarding Hormonal Regulation of Gastrointestinal

Which of the following statements regarding hormonal regulation of gastrointestinal function is TRUE?

A) An increase of H⁺ in the small intestine stimulates secretion of the hormone secretin, which in turn stimulates HCO₃^- secretion by the pancreas.
B) The presence of fatty acids in the stomach stimulates secretion of CCK, which in turn stimulates enzyme secretion by cells in the antrum of the stomach.
C) The presence of amino acids in the small intestine stimulates secretion of gastrin, which in turn stimulates HCl secretion by parietal cells.
D) The presence of fatty acids in the small intestine stimulates the secretion of the hormone secretin, which causes contraction of the gallbladder.
E) The hormone somatostatin stimulates the secretion of H⁺ into the lumen of the stomach.