The clearance of inulin is 100 mL min-1 in a patient. His plasm a concentration of solute X is 0.2mg% and a 4-hour urine specimen was 240 m L, with a urinary concentration of solute X of 60 mg% . From this information you can conclude
A) Substance X is not freely filtered B) Substance X is reabsorbed C) Substance X is secreted D) Substance X is both filtered and secreted E) Substance X is both freely filtered and reabsorbed