Gastric ulcers are commonly caused by Helicobacter pylori, which is a ________.
A. bacterium
B. type of cancer
C. drug
D. digestive enzyme
Answer:A
Gastric ulcers are commonly caused by Helicobacter pylori, which is a ________.
A. bacterium B. type of cancer C. drug D. digestive enzyme
Explanation: A) Correct!