All of the following statements are true regarding cervicofacial actinomycosis, EXCEPT_____________?

A. 110-20% of actinomycosis cases occur in cervicofacial region
B. The discharging pus contains visible sulphur granules
C. Cultures on blood agar often produce a typical molar tooth morphology
D. There is usually history of trauma such as tooth extraction or a blow to the jaw