Final answer:
The age group with the most traffic fatalities in California in 2009 was the 15-24 age group.
Step-by-step explanation:
In California in 2009, the age group that suffered the most traffic fatalities was the 15-24 age group. This demographic often faces higher risks due to factors such as inexperience, risk-taking behaviors, and potential distractions while driving. Young drivers in the 15-24 age range may be more prone to accidents, emphasizing the importance of targeted educational and preventive measures to address road safety within this age group. Strategies such as driver education programs, awareness campaigns, and stricter enforcement of traffic regulations can contribute to reducing traffic fatalities and promoting safer road behavior among young drivers.