A patient has completed 4 weeks of treatment with epoetin alfa. Which of the following assessment findings would most strongly indicate that treatment has been effective?
a)Capillary refill in the patient's nail beds is less than or equal to 3 seconds
b)The patient white blood cell level is within reference ranges
c)The patient's hemoglobin level is 11 g/dL
d)The patient maintains an oxygen saturation of 92% on room air