Correct Answer: C

Rationale: A bilirubin level of 4 mg/dL is elevated for a newborn and requires monitoring and potential intervention to prevent complications such as jaundice and kernicterus.

Correct Answer: D

Rationale: The client should check for the string each month after menstruation to ensure the IUD is in place. Regular checks can help identify any displacement.

Correct Answer: C

Rationale: Endometriosis is associated with an increased risk of developing ovarian cancer due to chronic inflammation and hormonal imbalances. The exact cause is not fully understood, but women with endometriosis should be monitored closely.

Correct Answer: A

Rationale: Phototherapy is used to reduce bilirubin levels in newborns with jaundice. However, the intense light can cause damage to the newborn's corneas and retinas. The use of an eye mask protects the infant's eyes while allowing the therapy to proceed. Regular monitoring of the newborn's temperature and hydration status is also important, but the eye mask is a key protective measure.

Correct Answer: B

Rationale: The nurse should inform the client that the nonstress test typically takes about 30 minutes and is used to assess fetal well-being by monitoring fetal heart rate in response to movements.