64   Which of the following is a true statement with respect to developmental testing in infants?

A. None of the available validated developmental tools are reliable in infants under 6 months of age.

B. An infant’s score on developmental assessment is a reliable predictor of future intelligence quotient.

C. Infant assessments are helpful in detecting mental retardation and developmental disorders.

D. Assessment in older infants focuses on sensorimotor and social responses.