What is a common hand signal used to indicate a left turn?

Answer: B — Left hand extended horizontally

The signal for a left turn is indicated by extending the left hand horizontally out to the side. This gesture is standard among motorcyclists and drivers to communicate turning intentions to other road users, ensuring clarity and safety on the road. By using this signal, you are effectively alerting nearby vehicles and pedestrians of your intention to turn left, helping to prevent misunderstandings that could lead to accidents. The other options do not accurately represent the accepted hand signal for a left turn. While different hand signals may indicate other actions, it is essential to remember the correct positioning and gesture for signaling a left turn to maintain safety and clarity when riding.