Final answer:
In assisting a client to the bathroom after knee replacement surgery, the best way to prevent a fall is to ask the client if they prefer to use crutches or a walker. These assistive devices provide the necessary stability and balance, thus minimizing the risk of falls.
Step-by-step explanation:
In the scenario mentioned, assisting a client to the bathroom post knee replacement surgery, the step that would most effectively prevent a client fall among the options provided is D. Ask the client if he or she prefers crutches or a walker.
After knee replacement surgery, using assistive devices for walking like crutches or a walker is a common practice as it provides the needed support and balance, hence reducing the risk of falls. The patient's preference should be respected because if they are comfortable with the assistive device, they are more likely to use it effectively and safely.
Learn more about Preventing Fall Post Surgery