Which Installation of Windows 10 Requests You Enter a Product

Multiple Choice

Which installation of Windows 10 requests you enter a product key during the install process?

A) When you are replacing a failed hard drive and the failed drive already had Windows 10 installed.
B) When you are replacing a failed motherboard on a system with Windows 10 installed and a Microsoft account was not used to sign in to Windows.
C) When you are replacing a failed motherboard on a system with Windows 10 installed and a Microsoft account had been used to sign in to Windows.
D) When Windows 10 becomes corrupted and you decide to perform a clean install to recover the OS.