What action should you take for a safe lane change?

The correct action to take for a safe lane change is to use your mirrors and signal. This practice ensures that you are aware of your surroundings, including the position of other vehicles relative to yours. When you use your mirrors, you can assess the traffic situation behind and beside you, which is crucial for identifying any vehicles that may be in your blind spots.

Signaling is equally important because it communicates your intentions to other drivers on the road. This alert allows them to anticipate your movement, helping to prevent potential collisions. By combining these two actions—checking mirrors and signaling—you create a safer environment for yourself and others during the lane change process, enhancing overall roadway safety.

The other options do not incorporate the necessary precautions and communication that are vital for a safe lane change, which is why they are not suitable choices.