19. Fro-Zone has two product lines: ice cream and frozen yogurt. Data for each product line for last month is as follows: One hundred percent of common fixed costs are unavoidable. Based on the above information, in which circumstance(s) would the company's overall net operating income increase? a. The company drops only the Ice Cream product line b. The company drops only the Frozen Yogurt product line c. The company drops both product lines d. None of the above 19. Fro-Zone has two product lines: ice cream and frozen yogurt. Data for each product line for last month is as follows: One hundred percent of common fixed costs are unavoidable. Based on the above information, in which circumstance(s) would the company's overall net operating income increase? a. The company drops only the Ice Cream product line b. The company drops only the Frozen Yogurt product line c. The company drops both product lines d. None of the above