You are a network administrator for a regional government agency. You have several cloud$-$hosted IaaS environments as well as on$-$premises infrastructure. You are needing to repeatedly provision isolated development, staging, and production environments for various online projects. It is important that these projects never have network connectivity to each other but that all have controlled internet access. What is the most efficient way to deploy your multitenancy routing services to deliver these networks in the cloud? Select one: a$.$ Deploy a virtual firewall b$.$ Deploy VRF for each project c$.$ Deploy a virtual load balancer d$.$ Deploy a single router with ACLs