According to the Most Recent Evidence, What Can Be Said

According to the most recent evidence, what can be said of Piaget's findings?

A) The capacities of infants usually are not as high as claimed by Piaget.
B) Object permanence has been shown as early as 1 month of age, thus refuting Piaget's claim that it is not established until toddlerhood.
C) Piaget's theory seems to underestimate the age by which a child masters object permanence, indicating they are not as egocentric as Piaget believed.
D) Piaget's concept that the qualitative changes in cognitive processing are more important than the quantitative changes has been effectively refuted.