The Nurse Speaking with a Student About Immunocompetence Correctly Defines

The nurse speaking with a student about immunocompetence correctly defines it as occurring when:

A) there has been an overwhelming allergic reaction.
B) the immune system cannot differentiate between foreign cells and the body's own cells.
C) the individual is exposed to a disease from which he has no immunity.
D) physiologic responses protect the body against invasion from microorganisms or toxins.