Which Heroku features should an Architect recommend to create a secure connection between Heroku and...

Heroku Private Spaces and Private Space VPN Connections, using Azure's built-in VPN endpoint.

Heroku Private Spaces and Private Space VPN Connections, using a compatible VPN endpoint on Azure

Heroku Shield Private Spaces and Internal Routing, using Azure's built-in VPN endpoint

Heroku Private Spaces and Private Space Peering, using Azure's VPC Peering.