D. Your response time is much faster.
Your immediate range refers to the area directly in front of your vehicle—typically the space you’ll reach within a few seconds while driving. Since you're so close to this area, you have less time to react to any changes that happen in it (like a pedestrian stepping out or a car suddenly stopping). That means your response time must be quicker, because there's less room and time to make decisions safely.
So, being prepared for changes in your immediate range is crucial because your response time needs to be faster, not slower or delayed.