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

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Answer: D