The Nurse Is Caring for a 3-Week-Old Boy Born at 29

The nurse is caring for a 3-week-old boy born at 29 weeks' gestation. While taking vital signs and changing his diaper after stooling, the nurse observes: his color is pink but slightly mottled; his arms and legs are limp and extended; he has the hiccoughs; there are respiratory pauses and gasping; his heart rate is regular and rapid. The nurse should recognize these behaviors as manifestations of which of the following?

A) Stress
B) Subtle seizures
C) Preterm behavior
D) Onset of respiratory distress