In Western Countries Up to 10% of the Population Develops

In Western countries up to 10% of the population develops gastric ulcers,many due to Helicobacter pylori.One adaptation this bacteria has is to secrete urease which produces the base ammonia from urea.How would this contribute to Helicobacter pylori causing ulcers?

A) Ammonia could be used as a food source for bacteria
B) Ammonia would cause the ulcers
C) Ammonia would prevent the immune system from killing the bacteria
D) Ammonia would neutralize stomach acids allowing bacteria to grow
E) Ammonia would kill the bacteria