A Child Is Shown a Small Scale Model of a Full-Size

A child is shown a small scale model of a full-size room. A tiny toy is hidden behind the miniature couch and the child is told, "A big toy just like this is hidden in the same place in the bigger room. Try to find it." The results of this study are that

A) ability to find the toy develops gradually during the concrete-operations period.
B) performance on this task is an excellent measure of the child's language development.
C) children age 2 1/2 fail completely, although children age 3 find the toy easily.
D) younger children actually find the toy faster than older children.