Sets of statements describing a data model for customization and pricing of tour packages based on popularity of destinations are listed below. Which of these sets is best suited to describing the model to executive project sponsors? Select one.

Question $2$ ?options:

Set D: Our model accurately explains the pricing acceptability levels among $75\%$ ?of customers categorized by discretionary spending levels. The customization $-$ based pricing tiers are expected to improve quarterly success rates for prospect conversion between $10\%$ ?and $25\%.$

Set C: Our model accurately predicted that $75\%$ ?of customers would find our new pricing plans acceptable. The customization $-$ based pricing tiers can be extrapolated to accommodate newer variables in pricing and customization levels.

Set B: Our model accurately predicted that $85\%$ ?of customers would find our new pricing plans acceptable. Our new pricing model will help us increase sales of customized packages by $25\%$ ?every quarter.

Set A: Our model accurately explains the pricing acceptability levels of $85\%$ ?of customers. The customization $-$ based pricing tiers will improve quarterly success rates for prospect conversion by $25\%.$