A company hosts its website on Amazon EC2 instances in the us-east-1 Region.The company is preparing to extend its website into the eu-central-1 Region, but the database must remain only in us-east-1.After deployment, the EC2 instances in eu-central-1 are unable to connect to the database in us-east-1.
What is the MOST operationally efficient solution that will resolve this connectivity issue?
Create a VPC peering connection between the two Regions. Add the private IP address range of the instances to the inbound rule of the database security group.
Create a VPC peering connection between the two Regions. Add the security group of the instances in eu-central-1 to the outbound rule of the database security group.
Create a VPN connection between the two Regions. Add the private IP address range of the instances to the outbound rule of the database security group.
Create a VPN connection between the two Regions. Add the security group of the instances in eu-central-1 to the inbound rule of the database security group.