You have the following routing design. You discover that Compute Engine instances in Subnet-2 in the asia-southeast1 region cannot communicate with compute resources on-premises. What should you do?

A. Configure a custom route advertisement on the Cloud Router. B. Enable IP forwarding in the asia-southeast1 region. C. Change the VPC dynamic routing mode to Global. D. Add a second Border Gateway Protocol (BGP) session to the Cloud Router.