Which,if Any,is NOT an Appropriate Guideline for the Effective Creation

Multiple Choice

Which,if any,is NOT an appropriate guideline for the effective creation and use of customer databases?

A) Customer databases should contain categories of customers who differ in terms of their purchase behaviors.
B) Customer databases should only include data that detail customer purchases over a specified time period.
C) Customer databases should be easily accessible to the frontline service provider.
D) Service marketers should be very sensitive to privacy issues as they create and use customer databases.
E) All of these guidelines are appropriate for the effective creation and use of customer databases.