Gretchen accidentally deleted a file on her MacBook Air while traveling. She backs up regularly to
Time Machine, but did not backup while she was away. From which location would you recover the
deleted file?

A.
FileVault

B.
Local Snapshots

C.
The encrypted Time Machine backup

D.
The Time Machine folder in /System/Library/

Explanation:
When you use a Mac notebook, you might not always be near your Time Machine backup drive.
When your backup drive isn’t connected, Time Machine creates copies of files you create, modify or
delete and stores them on your startup disk. These local backup copies are called “local snapshots.”
This feature lets you revert or recover a file if you accidentally change or delete it.
When your backup device becomes available, Time Machine copies local snapshots from your
startup disk to your normal backup drive. After the copy is finished, Time Machine doesn’t remove
your local snapshot data. This way your backup files are still available if you need to restore an item
the next time you’re disconnected.

https://support.apple.com/en-us/HT204015