When assessing a newborn girl with salt-wasting congenital adrenal hyperplasia due to 21 hydroxylase deficiency, the nurse notes that the infant has an enlarged clitoris. Which intervention should the nurse implement?

Review transcutaneous bilirubin levels with a bilirubinometer.

Observe and palpate newborn's breast tissue for enlargement.

Assess for signs of fluid retention and bilateral pedal edema.

Explain to the mother that the finding is due to increased androgen.