During Morning Rounds, a Physician Orders an Estimated Glomerular Filtration

During morning rounds, a physician orders an estimated glomerular filtration rate (eGFR) for a client in order to evaluate renal function.Which does the nurse understand the laboratory will require for this testing?

A) The client's complete 24-hour urine collection.
B) The client's most recent creatinine laboratory result.
C) The client's total protein value from admission testing.
D) The client's daily body weight obtained by nursing.