Bill, Who Is 30 Months Old, Has Just Been Administered

Bill, who is 30 months old, has just been administered the Bayley Scales of Development. He obtained average results on all of the subscales. What does this predict?

A) Bill is of average intelligence
B) Bill will score in the average range on later IQ tests
C) Bill suffers from intellectual disability
D) No later IQ score can be predicted from the Bayley scales