Whammo General Contractors is trying to determine what steps it might take to reduce its workers compensation insurance premiums. Whammo asks you to identify the factors on which workers compensation premiums are based. You correctly explain that they are based on these three factors: (Search Chapter 5) a. payroll, risk classification, and an experience modifier. b. sales, risk classification, and experience modifier. c. payroll, industry classification, and sales. d. payroll, risk classification, and years in business