The correct set includes CPM, CPC, and CPA, which represent the three primary pillars of display advertising monetization. CPM charges based on impressions, CPC charges per click, and CPA charges per completed action or conversion. These models align directly with standard industry metrics for measuring ad performance and revenue generation. Together, they offer advertisers flexible ways to pay for different stages of the user journey. This combination covers the essential mechanisms used to monetize visual advertising inventory effectively.