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What is the cause of autoimmune diseases?
A. They can be caused by both a mutated gene and a pathogen.
B. The causes of autoimmune diseases are unknown.
C. They are caused by a pathogen.
D. They are caused by mutated genes.

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LesboTren16

Answer: B

Explanation:  body's natural defenses — the immune system — attack the body's own healthy tissue
Bro is the d por qué casusa muted genes

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