You are creating a new application and require access to Cloud SQL from VPC instances without public IP addresses.
Which two actions should you take? (Choose two.)
A. Activate the Service Networking API in your project.
B. Activate the Cloud Datastore API in your project.
C. Create a private connection to a service producer.
D. Create a custom static route to allow the traffic to reach the Cloud SQL API.
E. Enable Private Google Access.
A C
https://cloud.google.com/vpc/docs/private-google-access
A and C , E is for bigquery, GCS and pub/sub etc.
C and E will be the answer.
https://cloud.google.com/sql/docs/mysql/configure-private-services-access#console_1