14 month old girl - sleep and behavioral concerns
- started screaming in the middle of the night for no reason
- the mother says -she used to listen, say our names and answer yes or no, but now she hardly speaks at all and never seems to be paying attention
- she does not make eye contact with the physician and sits on the floor periodically rubbing and clapping her hands

next step?
a FMR1 DNA analysis
b MECP2 gene analysis
c no diagnostic test is indicated
d phenylalanine level