Which of the following best describes the purpose of using lifecycle services for deploying an advanced wireless solution？（）

A. create a more effective sales strategy for partners.
B. reinforce customer confidence in partners selling products.
C. provide a consistent， repeatable， and proven method to ensure the network solution that is deployed delivers upon the customer’s goals for reliability and availability.
D. maximize the number of services required to support advanced technologies.
E. more clearly define the roles of account managers， systems engineers， and field engineers.