The ability to perceive a rod as being continuous behind an occluding block

A.is innate
B.is common in one-week old infants
C.can be accomplished by two-month-olds
D.occurs only after sharp acuity is developed

Acuity develops to almost 20/20 vision by the time the infant is

A.one month old
B.two months old
C.six months old
D.more than one year old

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