Final answer:
The notification email for a beta version of an Android app is sent to all users who have beta testing access, including developers and signed-up beta testers (option B).
Step-by-step explanation:
When the beta version of an Android app is available, the notification email is typically sent to all users who have beta testing access. This means that the developers of the app, as well as any users who have signed up or been granted permission to join the beta testing program for the app, will receive the notification email. It is important for the beta testers to receive this email because they play a crucial role in testing and providing feedback for the pre-release version of the app.
Hence, the answer is option B.