What are three ways to appropriately handle a difficult customer? (Choose 3)

A. Identify any practice or procedure to prevent further problems
B. Refer the customer to fellow coworkers for help
C. Identify the root cause of the problem
D. Only give attention to the customer if they spend a lot of money
E. Identify if the manager was notified of the problem first
F. Thank the customer for the opportunity to fix the problem