Why would a Windows NT/2000 administrator place the operating system, the program files and the data on different, discrete directories?

A.
To avoid confusion and duplication of upgrades between applications and the operating system

B.
To enhance security by modifying permissions for each resource as needed

C.
To restrict users from accidentally overwriting critical files (if they fill their home directories to capacity), which makes the operating system vulnerable to hacker attacks

D.
To keep the operating system partition from becoming overwhelmed with user program libraries and DLLs

Explanation:
By keeping the classes of programs separate – we can control security easier. Security is usually applied to a directory, and then all the files in the directory inherit the security attributes of the parent folder. Separation of the different classes of program makes modification of the security easier to maintain.
Incorrect Answers:
A: If there is any confusion or duplication issues, using different directories might not resolve those issues.
C: If a user overfills their home directory, they do not just jump into a system directory and overwrite system files. If system files were shared, and no protected, they can be overwritten anyway. Having a separate home directory further separates the user into his own region of permissions.
D: If there is only one partition on the system, then whether you have one directory, or separate directories, the disk is going to fill up.