The nurse reviews clinical data for a client who is 24 hours postpartum after a vaginal delivery. Which one of the following items would require follow-up by the nurse?

A Hematocrit 46% (0.46 L/L) [>33 %, 0.38-0.50 L/L] C Platelets 90,000 mm3 (90 x 10^9/L) [150,000-400,000 mm3, 130-380 x 10^9/L] D White blood cell 17,000 mm3 (17 x 10^9/L) [5,000-10,000 mm3, 3.5-10.5 x 10^9/L] B Creatinine 1.0 mg/dL (88.4 ┬Ámol/L) [0.6-1.1 mg/dL, 22-75 ┬Ámol/L]