You are a Dynamics 365 Finance and Operations developer.

You need to create an extension class.

Which action should you perform?

A. Mark the class as final.

B. Add the suffix .extension to the file name.
C. Mark the class as protected.
D. Mark the class as private.

Reference:
https://docs.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/extensibility/method-wrapping-coc