Patients Rarely Need Red Blood Cell Transfusions If the Hemoglobin

Patients rarely need red blood cell transfusions if the hemoglobin concentration is

A) Below 7 g/dL (70 g/L) and the patient has a low oxygen saturation level
B) Below 10 g/dL (100 g/L) and the patient is bleeding
C) Between 7 and 10 g/dL (70 and 100 g/L) and the patient has underlying cardiac disease
D) Above 10 g/dL (100 g/L) and the patient is hemodynamically stable