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

It is a screening test for spinal defects in the fetus.

It assesses various markers of fetal well-being.

This test identifies an Rh incompatibility between the mother and fetus.

This test assesses fetal lung maturity.