What type of lights will indicate an active taxiway?

Answer: C — Blue lights

The correct type of lights that indicate an active taxiway are blue lights. These blue lights are typically installed along the edges of taxiways and serve as visual cues for pilots operating on the ground. The purpose of blue lights is to clearly delineate the taxiway from other areas, such as runways or safety zones, ensuring that pilots can easily identify where they are taxiing. This helps maintain safety and allows for efficient movement on the airfield. Other colors such as red and green serve different functions in aviation lighting. Red lights are usually associated with warning or stop signals, and green lights often indicate the approach to a runway, guiding pilots during landing or takeoff. Therefore, blue lights are the standard for actively indicating taxiways in airfield environments.