A nurse is caring for a client who is scheduled for a maternal serum alpha-fetoprotein test at 15 weeks of gestation. The nurse provides which of the following explanations about this test to the client?

A This test assesses fetal lung maturity in the premature fetus. C This test identifies an Rh incompatibility between an Rh-negative mother and her unborn fetus. D It is a maternal blood screening test to identify neural tube defects (also known as spinal defects) and Down syndrome in the fetus. B It provides an assessment of various signs of physical and physiological wellbeing in the fetus.