The nurse is providing instructions to a client regarding the use of a walker . Which statement by the client would indicate the need for further instruction?None
选项：

A:"I need to inspect the rubber tips daily ."
B:"I need to wear shoes when ambulating ."
C:"I need to pick up the walker and move it forward, and then walk into the walker, one step at a time ."
D:"The walker height needs to allow for about 45 degrees of flexion at my elbow so that the height of the walker will be safe ."