When is it permissible to use a cell phone while driving?

Answer: C — Only when using hands-free technology

Using a cell phone while driving is generally discouraged due to the distraction it causes, but specific regulations allow for certain circumstances. The correct choice highlights that it is permissible to use a cell phone when utilizing hands-free technology. This option is correct because hands-free devices allow drivers to make phone calls or use navigation aids without taking their hands off the wheel or their eyes off the road. This minimizes distractions and helps maintain safer driving practices. The other situations provided do not align with typical regulations. Being stopped at a traffic light may still pose a danger since a driver may not be focused on the road ahead, making option about being stopped less safe overall. Indicating that one could use a phone “whenever necessary” lacks the regard for safety and could lead to dangerous distractions while driving. Finally, while emergency situations dictate that one should certainly be able to communicate, the laws often specifically allow for hands-free usage as a safer alternative without suggesting that cell phone use is broadly permissible in all emergency scenarios without restrictions.