The Signs and Symptoms of Infection with Helicobacter Pylori Are

The signs and symptoms of infection with Helicobacter pylori are the result of

A) damage to the lining of blood vessels by H. pylori.
B) invasion by H. pylori into the mucosa of the large intestine.
C) invasion by H. pylori into the mucosa of the stomach.
D) the production of exotoxins by H. pylori in the intestines.
E) the production of toxins by H. pylori in contaminated food.