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You plan to use Database Migration Service to migrate data from a PostgreSQL on-premises instance to Cloud SQL. You need to identify the prerequisites for creating and automating the task. What should you do? (Choose two.)

A.

Drop or disable all users except database administration users.

B.

Disable all foreign key constraints on the source PostgreSQL database.

C.

Ensure that all PostgreSQL tables have a primary key.

D.

Shut down the database before the Data Migration Service task is started.

E.

Ensure that pglogical is installed on the source PostgreSQL database.