Face ID is a biometric authentication method that allows you to securely unlock your iPhone or iPad, authenticate purchases, sign in to apps, and more, all with just a glance. However, there are situations where Face ID is not permitted and you need to enter your passcode instead. According to the Apple Device Support Reference Materials1, these situations include:
* The device has just been turned on or restarted.
* The user hasn't used their passcode or password to unlock their device for 156 hours (six and a half days), and the user hasn't used a biometric to unlock their device in 4 hours.
* The device hasn't been unlocked for more than 48 hours.
Therefore, the correct answer is C, D, and E.
References:
* Face ID, Touch ID, passcodes, and passwords