During an internal audit, you realized that one of your Cloud SQL for MySQL instances does not have high availability (HA) enabled. You want to follow Google-recommended practices to enable HA on your existing instance. What should you do?

A. Create a new Cloud SQL for MySQL instance, enable HA, and use the export and import option to migrate your data. B. Create a new Cloud SQL for MySQL instance, enable HA, and use Cloud Data Fusion to migrate your data. C. Use the gcloud instances patch command to update your existing Cloud SQL for MySQL instance. D. Shut down your existing Cloud SQL for MySQL instance, and enable HA.