Which Statement Best Describes How Stomach Cells Survive the Acidity

Which statement best describes how stomach cells survive the acidity and protein-digesting activities in the stomach?

A) because they are surrounded by large colonies of H. pylori
B) because they are covered by a thick, mucous secretion and rapidly undergo active mitosis
C) because they are protected by a high level of secreted enzymes from chief cells
D) because they have cell walls impermeable to acid