Exceed the maximum speed defined by the technical characteristics of the given vehicle.
Exceed the speed ensured by the "Speed Limit" recognition mark on the vehicle.
Without having to drive at very low speeds, obstructing the movement of other vehicles.
Brake sharply unless necessary to prevent a traffic accident
All the above actions✓Correct answer
Explanation
Each listed act is prohibited: exceeding the vehicle's design speed, exceeding the limit shown by its identification marking, obstructing traffic by driving unnecessarily slowly, and braking sharply without an accident-prevention need. Selecting only one act overlooks that each rule independently controls unsafe or obstructive speed choice.