Correct Answer is (A):
Testing and deploying
Custom roles include a launch stage, which is stored in the stage property for the role. The launch stage is informational; it helps you keep track of whether each role is ready for widespread use.
Each custom role can have one of the following launch stages:
Launch stages
ALPHA The role is still being developed or tested, or it includes permissions for Google Cloud services or features that are not yet public. It is not ready for widespread use.
BETA The role has been tested on a limited basis, or it includes permissions for Google Cloud services or features that are not generally available.
GA The role has been widely tested, and all of its permissions are for Google Cloud services or features that are generally available.