Why Is the Presence of a Cell Wall Significant from a Clinical

Why is the presence of a cell wall significant from a clinical standpoint?

A) Animal cells do not have cell walls, so antibiotics that target cell walls can destroy invading microorganisms.
B) All types of cells have a cell wall, and it makes identification of the causative agent of disease difficult.
C) Only gram- negative Bacteria have cell walls.
D) The cell wall protects microorganisms from destruction by the immune system.