A nurse is caring for a client who is breastfeeding for the first time and states that her milk does not seem to be enough for her newborn. Which of the following responses from the nurse would be most helpful at this time?

Rationale: A. Saying it is too early to tell may reassure the mother but does not provide helpful education about why her milk is adequate at this stage. B. Explaining that early breast milk (colostrum) is rich in antibodies helps the mother understand that even small amounts are nutritionally sufficient for her newborn and supports confidence in breastfeeding. C. Telling the mother the baby will gain weight soon is vague and does not address her immediate concern about milk adequacy. D. Suggesting formula feeding may undermine breastfeeding and is not the first-line supportive approach unless medically indicated.