An administrator wants to enable a VMware Cloud on AWS SDDC to interoperate with an on-premises SDDC.
How this is achieved?
A. Use the SDDC console to configure the IPSEC VPN connection between the VMware Cloud on AWS and on-premises vSphere SDDC.
B. Specify the static IP address of the on-premises SDDC when initially requesting a new VMware Cloud on AWS SDDC.

C. Use the AWS management Console to configure the connection between the VMware Cloud on AWS and on-premises vSphere SDDC.

D. Specify the fully qualified domain name (FQDN) of the on-premises SDDC when initially requesting a new VMware Cloud on AWS SDDC.

Explanation:
Set up a VPN connection between your on-premises data center and your SDDC. See “Configuring VPNs and Gateways” in Getting Started With VMware Cloud on AWS
Reference: https://docs.vmware.com/en/VMware-Cloud-on-AWS/services/vmc-aws-operations.pdf