Pick all that apply

• 1Choice 1.

  There's no separate delegate callback and no guaranteed grace period right before Suspended. The system stops the app whenever it likes within a few seconds of didEnterBackground

• 2Choice 2.

  applicationWillTerminate is always called before Suspended, so you can save your data there

• 3Choice 3.

  A suspended app stays in memory but runs no code, and it can be terminated with no notice under memory pressure

• 4Choice 4.

  beginBackgroundTask(expirationHandler:) can delay the stop, but there's a cap (around 30 seconds) and you have to call endBackgroundTask in the expiration handler

• 5Choice 5.

  Timers and socket callbacks keep running even in Suspended