Which of the following root keys consists of subkeys corresponding to the HKEY_CURRENT_USER
keys for each user profile actively loaded on the machine?

A.
HKEY_CURRENT_CONFIG

B.
HKEY_USERS

C.
HKEY_LOCAL_MACHINE

D.
HKEY_CLASSES_ROOT

Explanation:
The various root keys in Windows Server 2008 R2 are as follows:
1.HKEY_CLASSES_ROOT: It stores information about registered applications.
2.HKEY_CURRENT_USER: It stores settings that are specific to the currently logged-in user.
HKEY_CURRENT_USER is saved to HKEY_USERS when a user logs off.
3.HKEY_LOCAL_MACHINE. It stores settings that are specific to the local computer.
4.HKEY_USERS: It consists of subkeys corresponding to the HKEY_CURRENT_USER keys for each user
profile actively loaded on the machine.
5.HKEY_CURRENT_CONFIG: It includes information gathered at run time. This information is not
permanently stored on the disk. It is regenerated at the boot time.