Secure delete user data

An administrator would like to prevent data recovery software from retrieving any files from a
deleted user. Which option is the best choice?
A. Turn on FileVault 2, wait for encryption to finish, then delete the user.
B. Save the deleted user in a disk image, then use the Terminal to secure delete the image.
C. Delete the user using thedelete the home folderwith the erase home folder securely option
enabled.
D. Delete the user using the on change the home folderoption, then drag the folder to the trash and choose secure empty trash in theFinder.
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