You need to back up the user name and password for each logon account

A company has 10 client computers that run Windows 8. Employees log on to resources by
using multiple accounts. You need to back up the user name and password for each logon
account. What should you do on each client computer?

A.
Back up each user’s Personal Information Exchange PKCS #12 (.pfx) certificate.

B.
Use Credential Manager to save the information to a USB flash drive.

C.
Use File History to back up the ntuser.dat file.

D.
Run the Export-Certificate Windows PowerShell cmdlet.