Correct Answer: D

Rationale: Blurred vision can be an indicator of serious conditions such as preeclampsia, which involves hypertension and can lead to significant maternal and fetal complications.

Correct Answer: D

Rationale: The nurse should assist the client into the knee-chest position to relieve pressure on the umbilical cord. This position helps to prevent cord compression and improves fetal oxygenation.

Correct Answer: B

Rationale: Variable decelerations are often caused by umbilical cord compression. Repositioning the client can help alleviate pressure on the cord and improve fetal oxygenation.

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: 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.