Your sister has just been diagnosed with systemic lupus erythematosis,or lupus,which is an autoimmune disease.This means:
A) her immune system has rejected some of her tissues and organs.
B) her immune system has developed an allergic reaction to some of her tissues.
C) her immune system is correctly distinguishing between self markers and nonself markers.
D) she has an excess of phagocytic cells.
Correct Answer:
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