**Core Concept**
Wilson disease is a genetic disorder characterized by excessive accumulation of copper in the body, particularly in the liver, brain, and other organs. This accumulation can lead to various systemic complications, including anemia. The anemia in Wilson disease is primarily due to a defect in the production of ceruloplasmin, a copper-carrying protein.

**Why the Correct Answer is Right**
The correct answer is related to the role of ceruloplasmin in the metabolism of copper. Ceruloplasmin is essential for the incorporation of copper into the hemoglobin molecule, which is necessary for the formation of healthy red blood cells. In Wilson disease, mutations in the ATP7B gene lead to decreased production of ceruloplasmin, resulting in copper deficiency and impaired hemoglobin synthesis, ultimately causing anemia.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not directly related to Wilson disease or the cause of anemia in this condition.
**Option B:** While copper is indeed involved in the pathogenesis of Wilson disease, this option does not specifically address the mechanism of anemia.
**Option C:** This option is incorrect as it is not the primary reason for anemia in Wilson disease.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that Wilson disease is a multisystem disorder that can present with a range of clinical manifestations, including liver disease, neurological symptoms, and psychiatric problems, in addition to anemia.

**Correct Answer:**
C.