In Which of the Following Scenarios Should Base Configurations Be

In which of the following scenarios should base configurations be used to provide consistent, repeatable, and supportable configurations?

A) For non-production environments to keep their configurations in sync.
B) To ensure every customer has exactly the same base settings.
C) To provide settings that do not need to be customized to meet customer requirements.
D) To provide settings that can be customized to meet customer requirements.