In assessing a 2-year-old boy with croup, the practical nurse (PN) finds that he has become increasingly irritable and has developed tachypnea and resting- Which intervention is best for the PN to implement?

Encourage the child to drink adequate amounts of cool, clear liquids.

Instruct the mother to play with the child for stimulation and distraction.

Monitor the child's oxygen saturation level via pulse oximeter.

Administer a dose of acetaminophen as needed (PRN) per prescription.