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To ensure high availability in the event of a zone failure when deploying Cloud SQL using MySQL, which strategy is recommended?
A
Configure an external read replica in a zone in a different region.
B
Create a Cloud SQL instance in one zone, and configure automatic backup to a Cloud Storage bucket in the same region.
C
Create a Cloud SQL instance in one zone, and create a read replica in another zone within the same region.
D
Create a Cloud SQL instance in one zone, and create a failover replica in another zone within the same region.