A nurse is providing discharge education to the parents of a formula-fed newborn. Which statement by the parents indicates a need for further clarification about formula feeding.

The baby's stool should change from black to green/brown color over the next few days.

We'll feed the baby on-demand and watch for hunger cues.

We can use tap water from our kitchen faucet to prepare the formula.

We need to make sure to burp our baby during and after each feeding.