A 68-year-old woman with hematemesis has heartburn and stomach pain. Endoscopy shows inflammation involving the gastric body and antrum as well as a small gastric ulcer. Biopsies are positive for H. pylori. H. pylori damages the gastric mucosa primarily by increasing mucosal levels of which of the following?A) AmmoniumB) Bile saltsC) GastrinD) NSAIDsE) Pepsin.