Why should you check your vehicle before the start of the cold weather period?

Your answer is correct because all three points are important for safe driving in cold weather. Before the cold season starts, it is necessary to check the engine's cooling water system to ensure the antifreeze levels are adequate, preventing the coolant from freezing and causing engine damage. The battery should be tested because cold temperatures can reduce its performance, leading to starting problems. Finally, the windscreen washer system needs to be filled with antifreeze fluid to prevent it from freezing, ensuring you can keep the windshield clear for good visibility. These checks help avoid breakdowns and maintain safety during winter driving.