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?

A. Instilling 2 mL of 0.9% sodium chloride is not recommended as it can cause discomfort and does not improve the effectiveness of suctioning. B. Sterile technique, not clean technique, should be used when suctioning a tracheostomy to prevent infection. C. Applying suction in 3 to 4 second increments is appropriate to clear the occlusion effectively without causing trauma to the trachea. D. The catheter should not fit snugly into the tracheostomy tube; it should be small enough to fit comfortably to avoid trauma and ensure effective suctioning.