A nurse is teaching parents of infants about object permanence. The parents demonstrate understanding when they state that which of the following behaviors indicates that an infant has developed object permanence?

A. Recognizing a familiar face is part of social recognition but does not specifically indicate object permanence. B. Securing objects by pulling on a string shows fine motor skills but is not directly related to object permanence. C. Actively searching for a hidden object indicates that the infant understands that the object still exists even when out of sight, demonstrating the development of object permanence. D. Recognizing a familiar object does not necessarily indicate that the infant understands the concept of object permanence.