To create a highly available Cloud SQL instance with PostgreSQL 13 in the europe-west1 region, which command correctly enables high availability?
Agcloud sql instances create ha-instance --database-version=POSTGRES_13 --region=europe-west1 --tier=db-n1-standard-2 --availability-type=ZONAL
Bgcloud sql instances create ha-instance --database-version=POSTGRES_13 --region=europe-west1 --tier=db-n1-standard-2 --availability-type=REGIONAL
Cgcloud sql instances create ha-instance --database-version=POSTGRES_13 --region=europe-west1 --tier=db-n1-standard-2
Dgcloud sql instances create ha-instance --zone=europe-west1-b --tier=db-n1-standard-2 --availability-type=REGIONAL