B: Azure Policy's guest configuration feature provides native capability to audit or configure operating system settings as code, both for machines running in Azure and hybrid Arc-enabled machines. The feature can be used directly per-machine, or at-scale orchestrated by Azure Policy.
Configuration resources in Azure are designed as an extension resource. You can imagine each configuration as an additional set of properties for the machine.
E: Azure Arc is a bridge that extends the Azure platform to help you build applications and services with the flexibility to run across datacenters, at the edge, and in multicloud environments.
Microsoft recently [2019/2020] released Azure Arc, which unlocks new hybrid scenarios for organizations by bringing new Azure services and management features to any infrastructure.
Reference:
https://techcommunity.microsoft.com/t5/azure-developer-community-blog/azure-arc-for-servers- getting-started/ba-p/1262062
https://docs.microsoft.com/en-us/azure/cloud-adoption-framework/manage/hybrid/server/best- practices/arc-policies-mma
https://docs.microsoft.com/en-us/azure/governance/policy/concepts/guest-configuration