Final answer:
The nurse should implement strategies to reduce noise on the unit particularly on the 1st night of admission.
Step-by-step explanation:
The correct answer is A. 1st. The question is asking about the night of admission when the client is especially sensitive to hospital noises. The first night of admission is generally the most crucial in terms of adapting to the hospital environment. During this time, the nurse should implement strategies to reduce noise on the unit, such as keeping the volume down, using soft voices, closing doors gently, and minimizing alarms, to ensure a peaceful environment for the client.