Which step can an administrator take so that vSphere can access patch information if vCenter Server does NOT have Internet access? $($Choose the best answer.$)$

A$.$ Use a Web server on the vCenter Server machine to automate the transfer of files. B$.$ Install VMware vSphere Update Manager Download Service on a Windows server.

C$.$ Use an offline ISO file to import patches to the vSphere Lifecycle Manager depot manually.

D$.$ Install VMware vSphere Update Manager Download Service on a Linux server.