A nurse is teaching a client who is pregnant and has iron-deficiency anemia about taking ferrous sulfate elixir. Which of the following instructions should the nurse include in the teaching? (Select all that apply.)

"Drink the elixir using a straw to prevent staining your teeth."

"Take the medication with an antacid if it upsets your stomach."

"Increase your fiber intake to prevent constipation."

"Stop taking the medication if your stools become green or black."

"Increase your intake of dairy products to increase the absorption of this medication.