Which of the following actions incurs 2 demerit points?

Driving at an unnecessarily slow speed is considered a traffic violation that can lead to impaired traffic flow and increased risks of collisions. When a driver maintains a speed significantly below the posted limit without a valid reason, it can create confusion or hazards for other drivers. As a result, this action incurs 2 demerit points on your driving record.

In contrast, driving with a burnt-out headlight typically incurs a different penalty related to vehicle compliance rather than demerit points. Tailgating is considered more severe due to its potential to cause accidents and typically results in a higher demerit point penalty. Texting while driving is also a serious offense with significant demerit points due to the high risk of distraction it poses. Therefore, the action of unnecessary slow driving earns the specific penalty of 2 demerit points for disrupting safe and efficient driving conditions.