When should you move back into your lane after passing another vehicle?

After passing another vehicle, it is essential to move back into your lane safely and in a timely manner. Option C is the correct answer because returning to your lane before getting within 200 feet of an oncoming vehicle ensures that you have enough time and space to merge back safely without causing a potential hazard or collision. This decision should be based on maintaining a safe following distance and being considerate of other drivers on the road. Remember, it is crucial to always prioritize safety and follow traffic rules and regulations.