A. To plan
B. Planned
C. Planning
D. Plan
🧠 Explanation:
“It is very important to plan the traffic rules to accommodate the best flow of traffic.” Knowing this helps students and urban planning enthusiasts understand traffic management. Planning is key for studying geography or civics in school. Learning this helps with projects or exploring urban systems. It’s useful for social studies, ensuring clarity in academic work or general knowledge about traffic systems.