A nurse is preparing to perform suctioning for an infant who has a partial mucus occlusion of her tracheostomy tube. Which of the following actions should the nurse plan to take?

Select a catheter that fits snugly into the tracheostomy tube.

Instill 2 mL of 0.9% sodium chloride prior to suctioning.

Apply suction in 3 to 4 second increments.

Use clean technique when performing suctioning.