The correct answer is B .
High-ROI promotions are valuable because they generate better financial return from the promotional investment. The CPCM course states that promotion is "a key driver of incremental sales" and that retailers need to understand promotion planning, execution, assessment, and the factors that affect promotion outcomes. It also places retailer economics inside the CPCM curriculum, including how retail math works, what drives the retailer's financial statement, and calculations that tie to retail results.
Option B is the only answer that connects promotional spending to return. A high-ROI promotion does not merely create sales; it creates stronger sales or profit impact relative to the dollars invested. Option A is wrong because high-ROI planning does not eliminate the need to optimize frequency. Option C is wrong because successful promotions are often targeted, not identical for all shoppers. Option D is wrong because vendor funding may still be part of promotion economics; ROI analysis determines whether the investment is productive, not whether vendor funding is unnecessary.