The nurse includes the problem of “Risk for infection” in the plan of care 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 (8.69 to 11.17 mmol/L)], Hematocrit (Hct) [42% to 52% (0.42 to 0.52 volume fraction)], Red Blood Cell Count (RBC) [4.2 to 5.4 x 10⁶/µL (4.2 to 5.4 x 10¹²/L)], White Blood Cell (WBC) [5,000 to 10,000/mm³ (5 to 10 x 10⁹/L)].