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An ulcer is a break or discontinuity in a cutaneous or mucous membrane in the body. There are many types of ulcers. __________ is a type of ulcer in which there is an erosion of the gastrointestinal lining deep enough to penetrate the muscularis mucosa.

a.Gastroesophageal reflux disease (GERD)
b.Diverticulosis
c.A peptic ulcer
d.Gastritis