Final answer:
In response to a client hearing voices and feeling anxious, the nurse should ask the client what the voices are saying.
Step-by-step explanation:
In response to a client who is anxious and says they hear voices telling them what to do, the nurse should take the following action:
D. Ask the client what the voices are saying.
By asking the client what the voices are saying, the nurse can gather more information about the client's condition, which can help in assessing their mental state and determining the appropriate course of action. This is an essential step in understanding the client's experiences and providing proper care.