A nurse is helping an older adult client ambulate in the hallway for the first time since admission. The client has brought her standard walker from home. To ensure proper use of the walker and the safety of the client, which of the following actions should the nurse take?

The correct answer is A: Check that the client lifts the walker and then places it down in front of her. This is the correct action because it ensures that the client is using the walker properly to provide maximum support and stability while walking. By lifting the walker and then placing it down in front of her, the client is using the walker as intended to maintain balance and prevent falls. This action also promotes proper body mechanics and prevents strain on the client's body.

Other choices are incorrect:
B: Making sure that the upper bar of the walker is level with the client's waist is important for proper fit but does not address the immediate safety concern of using the walker correctly.
C: Walking in front of the client to guide her in moving the walker may obstruct the client's movement and independence.
D: Having the client move one leg forward with the walker is a vague instruction and does not ensure proper use of the walker.