The APPLY CHANGES INTO command overwrites the entire target table with data from the source table, which is efficient but does not meet the requirement for maintaining data integrity.

The APPLY CHANGES INTO command inserts new records from the source table into the target table without updating or deleting existing records, which partially meets the synchronization requirement.

The APPLY CHANGES INTO command captures changes from the source table and applies them to the target table by inserting new records, updating existing ones, and handling deletions, thus maintaining data integrity and meeting all given requirements.

The APPLY CHANGES INTO command deletes records in the target table that do not match the source table, ensuring the target table only contains the latest data but fails to handle updates and inserts.