You are working as a technician at certways .com. A Mac OS X 10.3 user has requested some assistance with a network connectivity issue that he has. The Mac OS uses Kerberos to access a kerberized service provided by a Mac OS X server 10.3 but the user experiences an authentication failure when he tries to do this. Which of the following steps might resolve the issue?

A.
Install Kerberos client software for Mac OS X 10.3 on the user’s computer.

B.
Synchronize all Kerberos principal’s clocks using a network time server.

C.
Ensure that the IP address of the user’s computer to allow the user to access the service.

D.
All of the above.