Correct Answer: D

Rationale: The client's statement correctly reflects that Rh immune globulin is administered after delivery to prevent sensitization in future pregnancies, especially if the baby is Rh-positive.

Correct Answer: A

Rationale: Contractions that are too frequent or prolonged can lead to uterine hyperstimulation, which can compromise fetal oxygenation. The nurse should stop the oxytocin infusion to reduce contraction frequency and intensity.

Correct Answer: D

Rationale: The client saturating a perineal pad every hour may be experiencing postpartum hemorrhage, which is a medical emergency requiring immediate assessment and intervention.

Correct Answer: C

Rationale: Tamoxifen is an anti-estrogen medication primarily used to treat hormone receptor-positive breast cancer. It works by blocking estrogen receptors in breast tissue, slowing the growth of tumors that require estrogen to grow.

Correct Answer: A

Rationale: Gestational diabetes can result in fetal macrosomia, a condition where the baby grows larger than normal due to excess glucose in the mother's blood. This increases the risk of complications during delivery.