A Baby Is in Its Crib While a Swarm of Relatives

A baby is in its crib while a swarm of relatives hovers,calling the baby's name and making cooing sounds.There is a radio playing in the background and sounds emanate from the television in the living room.All the while,the baby's mother is trying to get the baby's attention to get ready for its feeding.In all this hubbub the baby is most likely to attend to the mother's face and voice.What is the baby's behavior an example of?

A) ambient storage
B) delayed retrieval
C) selective encoding
D) recursive automatization