The Nurse Notes a New Order for Collection of a Sputum

The nurse notes a new order for collection of a sputum specimen for culture from an older adult client.Which is the most appropriate action by the nurse?

A) Place a clean cup at the client's bedside with instructions to spit into it when available.
B) Contact respiratory therapy to provide a treatment that will induce sputum collection.
C) Explain the order to the client and plan sputum collection for the following morning.
D) Encourage the client to increase fluid intake so that sputum can be more readily collected.