What are some best practices for extending an existing data model in Pega applications? (Select all that apply)

What are some best practices for extending an existing data model in Pega applications? (Select all that apply)
A . Avoiding direct changes to the core data classes to maintain upgradability.
B . Creating separate copies of data classes for each extension to prevent conflicts.
C . Using the "Apply Data Model Changes" wizard to propagate changes to related applications.
D . Collaborating with business stakeholders to define the scope and requirements of the extension.

Answer: ACD