The nurse includes the problem of "Risk for infection" in the plan of care (POC) for a client with myelosuppression. Which laboratory value provides the greatest support for this nursing problem? Reference Range: Hemoglobin (Hgb) [14 to 18 g/dL (140 to 180 g/L)] Hematocrit (Hct) [42% to 52% (0.42 to 0.52 volume fraction)] Red Blood Cell (RBC) [4.2 to 5.4 10/μL (4.2 to 5.4x10/L) White Blood Cell (WBC) [5,000 to 10,000/mm3 (5 to 10 10°/L)]