According to the Bayley Mental Scale,a _____ Infant Should Be

Multiple Choice

According to the Bayley mental scale,a _____ infant should be able to vocalize pleasure and displeasure,persistently search for objects that are just out of immediate reach,and approach a mirror that is placed in front of the infant by the examiner.

A) two-month-old
B) six-month-old
C) four-month-old
D) one-month-old