Answer:B) place the phone out of Callie's sight
Step-by-step explanation:
Object permanence begins mostly when a child is 4 to 7 months of age which is the ability of a baby to actual grasp that when something is not on their sight it doesn't mean it is gone forever. However if a baby hasn't developed this phenomenon , they will believe that when something disappear from their sight it is gone forever. It can help a child deal with separation anxiety when they understand that when their parents are. It in their sight it doesn't mean they are gone forever