Which of the following will the nurse include in teaching for a client taking ferrous sulfate [Feosol]?

A. Diluting liquid iron preparations with juice or water and using a straw can help prevent staining of the teeth and improve absorption. B. Dairy products can inhibit iron absorption, so they should be avoided when taking iron supplements. C. Green or black stools are a common side effect of iron supplements and do not typically require notifying the provider unless there are additional concerns. D. Citrus juices, such as orange juice, can actually enhance iron absorption and are often recommended to be taken with iron supplements.