Internal tooth resorption is the loss of dentin and other tooth tissues from the inside, often triggered by trauma to the tooth but sometimes without any known cause. In some cases, the immune system is thought to trigger osteoclasts to begin attacking the tooth. How would this condition be characterized? O A. This is an allergic reaction. O B. This is an autoimmune condition. O C. This is an opportunistic disease. O D. This is a communicable disease

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