Which of the Following Will Help an Organization Maintain Consistent

Which of the following will help an organization maintain consistent business operations?

A) Marketing,Sales,and Accounting departments decide to use the same vendor for a new system
B) Sales decides to implement a new system without considering other departments
C) A new office policy states that all managers can implement their own policies for purchasing supplies and materials
D) Marketing decides to save customer's email addresses in the marketing system,even though other organizational systems do not have this capability