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In order to connect various applications that have dynamic public IP addresses to a Cloud SQL instance, you have ensured that users are configured with strong passwords and SSL connections are enforced to your Cloud SQL instance. You intend to use the Cloud SQL public IP while ensuring that the connections remain secure. What steps should you take to achieve this?
A
Add CIDR 0.0.0.0/0 network to Authorized Network. Use Identity and Access Management (IAM) to add users.
B
Add all application networks to Authorized Network and regularly update them.
C
Leave the Authorized Network empty. Use Cloud SQL Auth proxy on all applications.
D
Add CIDR 0.0.0.0/0 network to Authorized Network. Use Cloud SQL Auth proxy on all applications.