A nurse is reinforcing teaching about phenylketonuria (PKU) testing with the parent of a newborn.Which of the following statements by the parent indicates a need for further teaching?

“My baby will be placed under special lights if the test is elevated.”.

“Sometimes the test is repeated in the doctor’s office at the 2-week check-up.”.

“My baby must take formula or breast milk before the test is done.”.

“This test checks for a genetic disorder that can be corrected by diet.”.