Which of the Following Describes One Aspect of Iron Toxicity

Which of the following describes one aspect of iron toxicity?

A) Among men in Canada, it is twice as common as iron-deficiency anemia.
B) In adults, the consumption of alcohol is somewhat protective against absorption of excess iron.
C) In most people with this disorder, infections are rare because bacteria are killed by excess iron in the blood.
D) It is usually caused by a virus that attacks the intestinal mucosal cells, leading to unregulated and excessive iron absorption.