The Nurse Is Answering Phone Calls at the Pediatric Clinic

The nurse is answering phone calls at the pediatric clinic. Which call should the nurse return first?

A) Mother of a 2-week-old infant who doesn't make eye contact when talked to
B) Father of a 1-week-old infant who sleeps through the noise of an older sibling
C) Father of a 6-day-old infant who responds more to mother's voice than to father's voice
D) Mother of a 3-week-old infant who has begun to suck on the fingers of the right hand