Final answer:
Determining the competitive advantage that would attract customers is not a step in monitoring and reducing customer defection. It's related to market positioning and attracting new customers, rather than directly addressing retention and churn issues.
Step-by-step explanation:
Among the listed options, the one that is not a step in monitoring and reducing the customer defection rate is C. Determine the competitive advantage that would attract customers. The steps usually involved in managing customer churn focus on understanding and measuring the current customer base and retention dynamics, identifying reasons behind customer turnover, and estimating the financial impact of losing customers to implement strategies for retention. Identifying competitive advantages may be part of a broader strategy to enhance overall market positioning and attract new customers, but it is not specifically a step in the process of monitoring and reducing the rate at which customers stop doing business with a company.