Choice A rationale:

Administering antibiotics would be indicated if the patient develops a respiratory infection, but it would not directly address the issue of dry and crusted secretions.

Choice B rationale:

Increasing suction frequency may help remove secretions, but it may also lead to increased irritation and trauma to the tracheal lining. It is not the first-line intervention for dry and crusted secretions.

Choice C rationale:

Providing humidification and hydration helps to moisten the secretions, making them easier to expectorate or suction. It is the most appropriate intervention to address dry and crusted secretions in a patient with a tracheostomy tube.

Choice D rationale:

Performing daily tracheostomy tube changes is not indicated solely to address dry and crusted secretions unless there is a specific problem with the current tube that requires changing.

Choice E rationale:

Recommending a fenestrated tracheostomy tube would not directly address the issue of dry and crusted secretions. Fenestrated tubes are more relevant for patients who need speech assistance, which is not the primary concern in this case.