What does a green arrow showing with a red traffic light indicate?

Answer: B — You may go ahead carefully in the direction shown by the arrow

A green arrow displayed alongside a red traffic light provides specific guidance to drivers. It indicates that while the traffic light is red, vehicles may proceed in the direction indicated by the green arrow. This means that drivers are permitted to turn or travel in the direction of the arrow even though the signal for the other lanes is indicating a stop. This signal is designed to facilitate traffic flow for turns while still enforcing the need for caution and adherence to the red light for other directions. It clearly communicates that the movement in the direction of the green arrow is allowed, ensuring that drivers can proceed without fear of running a red light, as long as they do so safely and in accordance with any other rules of the road.