The nurse is explaining to an older client about a creatinine clearance test that has been prescribed. what response by the client indicates that there is a need for further teaching? 1. " This test measures the levels of all of the medications that I take ". 2." Within aging, the kidneys don't clear all of my medications, so I can get very ill." 3. " in order clients, changes in the renal system lead to less blood flow to the kidneys". 4. " The health care provider has to do studies on my kidneys to see how they are filtering ".