Nadira is testing an application that needs to work on multiple operating systems. For this purpose, she uses Hyper$-$V to set up a Windows Server $2019$ virtual machine $($named VM$1)$ and a Linux$-$based virtual machine $($named VM$2)$ on her host Windows $10$ operating system. She sets up a third virtual machine, Windows Server $2012($named VM$3),$ to test the compatibility of the application between Windows Server $2019$ and $2012$ versions.

Which of the following must be true if VM$3$ was set up successfully using nested virtualization?

a$.$ Nadira removed VM$2$ to accommodate VM$3.$

b$.$ Nadira powered off VM$1,$ ran a PowerShell command, and powered on VM$1.$

c$.$ Nadira ran the following PowerShell command: Get$-$VMNetworkAdapter $-$VMName VM$3|$ Set$-$VMNetworkAdapter $-$MacAddressSpoofing On$.$

d$.$ Nadira enabled nested virtualization in Windows $10$ using a PowerShell command.