When Would a Child's Bayley Test Scores Be Average

Multiple Choice

When would a child's Bayley test scores be average?

A) There are no norms, so an average score cannot be determined.
B) When the infant can complete 100% of the items for his or her age group.
C) When the infant passes the test at the age at which 50% of other infants pass the test.
D) It differs from child to child based upon genetics and environment.