The Nurse Is Caring for Four Newborns Who Have Recently

The nurse is caring for four newborns who have recently been admitted to the newborn nursery. Which labor event puts the newborn at risk for an alteration of health? The infant's mother had:

A) Ruptured membranes for 36 hours.
B) An IVof lactated Ringer's solution.
C) A labor that lasted 12 hours.
D) A cesarean birth with her last child.