A 91-Year-Old Patient Learns That His Urine Protein Is 8

A 91-year-old patient learns that his urine protein is 8.2 mg/100 mL.When asked to explain the significance of the result,the nurse replies:

A) "It may be elevated because of a urinary tract infection."
B) "The result is not significant because it's within normal limits."
C) "The level is usually elevated in people your age."
D) "Mild chronic renal failure causes a decrease in urine protein."