Which of the following must obtain a California driver's license?

The correct choice indicates a scenario where an employee of the state of California operating a state-owned vehicle does not need to obtain a California driver's license because they are covered under their employment provisions. Employees driving on official state business are often granted some exemptions and privileges related to licensing while performing their job duties, particularly when they possess a valid license from their home state.

Understanding the context of the other choices clarifies why they require a California driver's license. Visitors from another state can legally drive with their current state license for a certain period without needing to get a California license. A minor with parental consent may obtain a driver's license but must still apply for it within the parameters set by California law. Those over the age of 18 are generally required to hold a valid California driver's license if they intend to drive regularly in the state.