A large e$-$commerce company is considering implementing an advanced AI$-$driven customer service chatbot. The CEO is enthusiastic about the potential for improved customer experience, but the CFO is skeptical due to the difficulty in quantifying the benefits. As the CIO, how would you approach evaluating this investment?A$)$ Focus solely on cost savings from reduced human customer service staffB$)$ Implement the chatbot on a small scale and measure the impact on customer satisfaction scoresC$)$ Develop a comprehensive evaluation model that includes proxy metrics for customer satisfaction, retention rates, and operational efficiencyD$)$ Postpone the investment until more concrete ROI data is available from competitors