A company runs an internal application on EC2 instances across two VPCs (VPC-A and VPC-B) in the same AWS account. Developers need to reach the application in VPC-A using the custom domain name app.internal.example.com. A CloudOps engineer created a Route 53 private hosted zone for internal.example.com and associated it only with VPC-A. Instances in VPC-A resolve the name correctly, but instances in VPC-B receive an NXDOMAIN response when querying app.internal.example.com. What is the correct action to enable resolution from VPC-B?