Which of the following actions is NOT allowed when crossing lane markings?

Answer: A — Crossing a solid yellow line to pass

Crossing a solid yellow line to pass is not allowed because a solid yellow line indicates that passing is prohibited in that area. This marking is used to signify that it is unsafe to overtake another vehicle due to various potential hazards, such as oncoming traffic or unclear visibility. The purpose of this rule is to enhance road safety by preventing maneuvers that could lead to collisions. In contrast, crossing a broken white line to change lanes is permissible, as it indicates that lane changes are allowed when safe to do so. Similarly, crossing a solid white line can be done when it is safe, although it is generally discouraged, as solid white lines often indicate that you are moving between lanes that serve different functions. Crossing a broken yellow line to pass is also allowed since it indicates that passing in that area is permitted, assuming it is safe to do so.