One Difference in the Way the Human Body Regulates Iron

One difference in the way the human body regulates iron and copper status is that

A) unlike iron, copper is always absorbed at a high rate even when copper stores are high.
B) excess iron is excreted while excess copper is not.
C) excess copper is excreted while excess iron is not.
D) iron toxicity can result in liver damage, whereas copper toxicity does not.