A 6-month-old infant is discharged from the clinic following a diagnosis of an infectious ...

A 6-month-old infant is discharged from the clinic following a diagnosis of an infectious respiratory disease.
 
  Health teaching provided by the pediatric nurse includes acetaminophen (Tylenol) dosing, warning signs of respiratory difficulty, and follow-up visits. Several hours later, the patient's parents become aware that his breathing has become more difficult and that his cry has been weak for the last hour. Their best action is:
  A) continue to observe the patient to see if his breathing improves.
  B) give the patient another dose of acetaminophen (Tylenol).
  C) return to the hospital or clinic immediately.
  D) re-take the patient's temperature in one half hour.