Which of the following statements about eosinophils is CORRECT? A. Constitute about 0.5%-3% of the leukocyte population. B. Packed with coarse, pink-staining granules with Wright stain. C. Usually have a polymorphous nucleus with 2 lobes. D. Most are phagocytic leukocytes. E. May release histaminase to ease the effects in allergic reaction.