Which of the Following Statements Is True About Customer Retention

Which of the following statements is true about customer retention and customer life expectancy?

A) The higher the customer retention rate,the lower the short-term profit impact.
B) As customer retention increases,the customer's life expectancy decreases.
C) Customer life expectancy decreases exponentially with customer retention.
D) In general,it costs five times more to replace than to keep a customer.
E) Higher levels of customer retention have a long-term negative impact on profits.