When is it necessary to use your turn signals?

Answer: B — When changing lanes or turning

Using turn signals is essential for communicating your intentions to other drivers on the road, ensuring safety for everyone. It is necessary to use turn signals when you are changing lanes or making a turn, as this alerts other drivers of your intended actions. This signaling helps to prevent confusion and potential accidents by clearly informing surrounding vehicles of your movements, allowing them to adjust their speed or position accordingly. While other situations, such as parking in a lot or being aware of other cars, may require caution or awareness of surroundings, they are not specific to the need for signaling. In fact, turn signals should be used consistently regardless of the speed you are driving, making the emphasis on speed in that incorrect choice irrelevant to the fundamental principle of safe driving. Thus, the requirement to signal during lane changes or turns is a critical safety rule for all drivers.