Regarding the snapshot technology, which of the following statement is incorrect?

Regarding the snapshot technology, which of the following statement is incorrect?
A . When rolling back a file system snapshot, you must cancel the shared mount of the source file system
B . After opening multiple snapshots of the same file system, roll back to one of the snapshots. After the roll-back is completed, all snapshots after the point-in-time when the target snapshot was created will be deleted
C . When manually creating a snapshot for a file system, if the product specification limit is exceeded, a new snapshot cannot be created for the file system
D . When creating a periodic snapshot for the file system, the storage system automatically deletes the earliest created snapshot and automatically generates a new snapshot

Answer: D