Piaget Observed That Infants Did Not Attain Object Permanence Until

Piaget observed that infants did not attain object permanence until they reached eight months of age, but more recent research suggest that infants:

A) as young as 2 months old have this ability.
B) do not achieve this ability until around 10 months of age.
C) as young as 3 to 4 months old have this ability.
D) as young as 6 months old have this ability.