¿Cuál de las siguientes opciones indica mejor una campaña eficiente y de alto rendimiento?

An efficient and high-performing campaign is characterized by a low Advertising Cost of Sale (ACOS) and a high Return on Ad Spend (ROAS). A low ACOS means you're spending less on advertising relative to the sales generated, indicating cost-effectiveness. A high ROAS signifies that for every dollar spent on ads, you're generating a significant amount of revenue, demonstrating strong profitability. Conversely, a low ROAS or high ACOS suggests inefficiency. A high ACOS with a high ROAS is contradictory, as high ad spend relative to sales would inherently lower the return.