A nurse is collecting data on the mobility of a client. Which of the following actions should the nurse take first?

A. This requires balance, strength, and endurance. It is a more advanced mobility assessment that should only be performed after ensuring the client can tolerate sitting and standing safely. Performing this first could increase the risk of falls. B. This is the safest initial step in a mobility assessment. It allows the nurse to assess the client’s orthostatic tolerance, balance, and strength before standing. Observing the client in this position helps identify dizziness, weakness, or unsteadiness, which can guide further assessment safely. C. While placing feet on the floor engages lower extremity muscles, it does not provide sufficient information about how the client tolerates a transition from supine to upright. It is a preparatory step, but sitting on the edge is safer first. D. Standing is a higher-risk activity, especially in clients with limited mobility or postural hypotension. This should only be attempted after confirming the client can sit safely on the edge of the bed.