A client with metastatic bone cancer is requesting pain medication. Which approach should the nurse use to assess the quality of the client's pain?

A. Asking the client to describe the pain allows for a detailed assessment of the pain's quality, location, intensity, and any aggravating or alleviating factors. This information is crucial for tailoring pain management strategies to the client's specific needs. B. Identifying effective pain relief measures is important but comes after understanding the pain's characteristics. C. Observing body language and movement can provide clues about pain but is subjective and less accurate than direct communication. D. A numeric pain scale measures pain intensity but does not provide information about the quality or nature of the pain.