California law requires that you inform the DMV within 5 days when you:

Answer: C — Change your address

If you lose your license, you should automatically inform the DMV, rather than taking 5 days to do so. If you get a new job, you are not required to inform the DMV as it has no relevance to your driving status. Similarly, buying a new car does not require immediate notification, but you will need to register the car with the DMV eventually. Changing your address is the only scenario that requires immediate action as it affects your driving record and the DMV's ability to reach you for important matters.