What should you do to signal that you are about to slow down and brake?

To signal that you are about to slow down and brake, lightly flashing your brake light is an effective and clear method of communication to other road users. This action provides a visual cue to drivers or cyclists behind you, indicating that you will be decelerating. It helps maintain safety on the road by allowing others to anticipate your movement and adjust their speed accordingly.

Using the brake light is particularly important because it captures the attention of those following you, especially in situations where sudden stops may lead to collisions. It is always encouraged to utilize the brake light effectively in conjunction with other safe practices, such as checking your mirrors before slowing down.

In contrast, coming to a stop immediately does not provide other drivers with sufficient warning about your intentions to slow down, which could result in accidents. Showing a hand signal generally indicates your intent to turn or change lanes rather than simply slowing down, and not providing a notification at all, as suggested by the "none of the above" option, would neglect the responsibility of ensuring the safety of you and other road users.