A nurse is providing teaching to the parents of a newborn about newborn genetic screening. Which of the following statements should the nurse include in the teaching?

A. Blood is typically drawn from the heel, not the inner elbow, for newborn genetic screening. B. There is no need to give water before the test; it is a simple blood draw. C. The newborn screening test should be performed after 24 hours of age, as this ensures enough time for metabolic disorders to manifest in the blood. D. This test is generally performed once, but it may be repeated later if there are concerns or abnormal results.