You’ve decided to convert from standard shadow passwords to MD5 passwords. You make the
appropriate changes to the /etc/pam.d/ files. What do you do next?

A.
Nothing, the passwords will be changed as users login and out.

B.
Nothing, users will be automatically prompted to change their passwords at the next login.

C.
You need to manually change all the passwords using the passwd program.

D.
Delete and recreate all the users.

E.
Change the /etc/pam.d files back because shadow passwords and MD5 passwords are
incompatible.