In Studies in the United States and Africa's Ivory Coast,DeLoache

In studies in the United States and Africa's Ivory Coast,DeLoache and colleagues observed infants using their hands to explore pictures.What is true about their observations?

A) Children explored the pictures as though they were objects.
B) Children patted,rubbed and grasped the pictures in an attempt to lift the depicted object off the page.
C) Manual exploration of the pictures diminished by 15 months of age,hinting at the symbolic understanding of pictures.
D) All of these are true.