A nurse is caring for a client who will have blood sampling for a serum creatinine level and asks what this test shows. Which of the following responses should the nurse make?

A. Deflecting the question to the doctor does not provide the patient with helpful information and shows a lack of communication. B. While the test can indicate renal impairment, it is more accurate to say it assesses overall kidney function rather than confirming a specific disease. C. Although medications can affect kidney function, the serum creatinine level is not specifically for evaluating medication interference. D. The serum creatinine test is a standard measure of kidney function, indicating how well the kidneys are filtering waste from the blood.