A nurse correctly explains to the parents of a newborn that a metabolic screening test:

Rationale: A. A metabolic screening test does not assess the metabolic rate. B. Emotional or psychological disorders are not detected through newborn metabolic screening. C. Newborn metabolic screening is a vital test that checks for numerous rare, but serious inherited metabolic and genetic disorders, such as phenylketonuria (PKU), congenital hypothyroidism, galactosemia, and others. Early detection allows for prompt treatment to prevent severe complications like intellectual disability, organ damage, or death. D. While infections can affect development, they are not the primary focus of the newborn metabolic screening test.