To Show How Much He Appreciates the Business of a Regular

Multiple Choice

To show how much he appreciates the business of a regular customer,Claude,a software salesperson,should do all of the following EXCEPT:

A) send information about problems with competing products.
B) call the customer when he solves a problem for the customer.
C) send greeting cards for birthdays and other special occasions.
D) write congratulatory notes to customers who receive awards.
E) e-mail information to customers about relevant product modifications.