The Child Was Diagnosed with Phenylketonuria Shortly After Birth and Has

The child was diagnosed with phenylketonuria shortly after birth and has been treated by the endocrine clinic for the last four years. The mother has missed the last three appointments. When the child keeps the next appointment, the mother assures the nurse that the child has followed the dietary restrictions. Which finding would make the nurse question this statement?

A) The child's body has a musty odor.
B) This child is a blue-eyed blond.
C) The child appears sleepy and uninterested in the surroundings.
D) The child has a sunburn over his entire body.