After making an analysis of the financial statements of Special Industries, the following is verified: 2019: Income - USD 1,947,500 Variable Operating Cost - USD 1,000,000 Fixed Operating Cost - USD 800,000 Net Income - USD 150,000 2018: Income - USD 2,050,000 Variable Operating Cost - USD 750,000 Fixed Operating Cost - USD 800,000 Net Income - 310,000 Select one: A. Although sales were reduced, due to the efficient management of Fixed Cost, which remained the same in both years, the profit margin was maintained at similar levels in 2019 and 2018. b. Revenues decreased by less than 5%, while fixed and variable costs experienced an increase, causing the profit margin to be reduced by approximately 10%. c. Revenues decreased by less than 5%, however, due to the significant increase in variable operating costs, the profit margin was reduced by approximately 10%.