Narly Skateboards manufactures three different product lines, Base, Long, and Trick. Considerable market demand exists for all models. The following per unit data apply: Base ModelLong ModelTrick ModelSelling price$$100$$$120$$$140$Direct materials $121212$Direct labor $($$$12$ per hour$)242448$Variable support costs $($$$4$ per machine$-$hour$)81616$Fixed support costs $2020206.)$ Which model has the greatest contribution margin per unit?A$)$ base modelB$)$ long modelC$)$ trick modelD$)$ both the base model and the long model