Michael Thomas Has a User Account Named Mthomas

Michael Thomas has a user account named mthomas. Michael has just left the company and his replacement is in the process of being hired. Michael's account was a member of several groups that are assigned rights and permissions throughout the network. His replacement will require the same level of access that Michael had including access to all his work files. What is the best approach to ensuring that Michael's replacement can easily be assigned the necessary rights and permissions?

A) Delete Michael's account. Ask him which groups his account was a member of and add the new user's account to those groups.
B) Disable Michael's account. When his replacement is hired, rename the account, change the password, and re-enable it.
C) Disable Michael's account. Find the groups his account is a member of, create an account for the new user and add the new user's account to those groups.
D) Delete Michael's account to clear security information. Create the mthomas account again so it is still a member of the groups it was before and then rename the account.