As of 2003, what percent of passenger vehicles offered head-protecting side airbags?

In 2003, approximately 40% of passenger vehicles were equipped with head-protecting side airbags. This technology was introduced to enhance vehicle safety, particularly in side-impact collisions. These airbags are designed to deploy and cushion the head during an accident, significantly reducing the risk of traumatic brain injuries and fatalities. The implementation of such safety features became increasingly significant during this period as awareness of vehicle safety standards grew.

The other options reflect lower percentages, which do not accurately represent the adoption rate of this crucial safety feature. Each of those lower values suggests less widespread availability, which understates the popularity and importance of head-protecting side airbags in enhancing passenger safety.