You Plan to Deploy Cloud SQL Using MySQL

You plan to deploy Cloud SQL using MySQL. You need to ensure high availability in the event of a zone failure. What should you do?

A) Create a Cloud SQL instance in one zone, and create a failover replica in another zone within the same region.
B) Create a Cloud SQL instance in one zone, and create a read replica in another zone within the same region.
C) Create a Cloud SQL instance in one zone, and configure an external read replica in a zone in a different region.
D) Create a Cloud SQL instance in a region, and configure automatic backup to a Cloud Storage bucket in the same region.