Sammie's Pizza sells an average of 150 pizzas per week, of which 20% are single-topping pizzas and 80% are supreme pizzas with multiple toppings. Singles sell for $8 each and incur variable costs of $2. Supremes sell for $12 each and incur variable costs of $6. Which pizza should Sammie's Pizza promote to maximize profits? A. Both should be promoted equally because they have the same contribution margin per unit. B. Singles because they contribute the highest total contribution margin. O c. Singles because they have the highest contribution margin ratio. OD. Supremes because they have the highest contribution margin ratio