A 32-year-old male patient is diagnosed with Hodgkin lymphoma. Initial lab work reveals a WBC of 20 x 109/L, hemoglobin of 10.1 gm/dL, a serum albumin of 3 g/dL, and lymphopenia of 0.5 x 109/L. Staging studies identify stage III disease. What is this patient's prognostic score?
a. 2
b. 3
c. 4
d. 5