The problem is an ongoing illegal encroachment on public space (footpaths). A proper response should address the immediate problem, penalize the wrongdoing, and prevent its recurrence.
\[\begin{array}{rl} \bullet & \text{Course of Action I: Clearing the footpaths is the immediate and necessary step to solve the existing problem. This is a logical first step.} \\ \bullet & \text{Course of Action II: Charging a hefty penalty acts as a deterrent and punishes the illegal act. This is a logical punitive and deterrent measure.} \\ \bullet & \text{Course of Action III: Setting up a monitoring system is a necessary long-term step to ensure that the problem does not reappear after the initial clearing. This addresses the preventive aspect.} \\ \end{array}\]
All three courses of action are logical, practical, and address different aspects of solving the problem (immediate, punitive, and preventive). Therefore, all three follow.