The Major Point of Disagreement Between Piaget and Other Researchers

The major point of disagreement between Piaget and other researchers concerning development of the object concept concerns whether

A) children have such a concept by the time they reach two years of age.
B) cultural influences affect the age at which the object concept is achieved.
C) the object concept is acquired as early as three or four months of age or later in the first year of life.
D) individual differences account for the finding that some infants show the object concept early in infancy,whereas others show evidence for it much later.