What is the purpose of warning lights and sirens in emergency mode?

Answer: C — To request the right-of-way through traffic.

The warning lights and sirens exist to signal other road users to yield the right-of-way so the emergency vehicle can reach the scene quickly and safely. They provide a clear, urgent indication that an incident requires priority travel, allowing the unit to move through traffic with fewer delays. It’s not a decorative feature or a license to break rules; it’s a legal and safety signal that you must respond to by slowing down, pulling over to the right and stopping if needed, and only proceeding when the path is clear and the vehicle has passed.