Your subscription contains an Azure Web App named App1 and a VM named VM1. VM1 runs SQL Server and is connected to virtual network VNet1. All resources are in the US Central region. To allow App1 to connect to VM1 while minimizing cost, which of the following should you include?

Regional virtual network integration allows App1 to connect to resources within VNet1, such as VM1, by injecting the web app into the virtual network. This is a cost-effective solution for private communication within the same region. Gateway-required virtual network integration is for connecting to virtual networks in different regions or on-premises networks, which is not needed here. Azure Front Door is a global, scalable entry-point that uses the Microsoft global edge network to create fast, secure, and widely scalable web applications, but it's not for internal app-to-VM communication. Azure Application Gateway is a web traffic load balancer that enables you to manage traffic to your web applications, also not for direct app-to-VM private connectivity. NAT gateway integration is for outbound internet connectivity for a virtual network, not for inbound connections to a VM from an app.