Final answer:
The correct statement is C. These unexpected stops in between can often make the entire trip. The passage suggests that unexpected stops during a road trip, often unplanned, can become the highlight and define the overall experience of the trip.
Step-by-step explanation:
The detail from the passage that supports the idea that spontaneous stops can be remarkable is these unexpected stops in between can often make the entire trip. This statement directly suggests that the unplanned experiences encountered on a journey can be so significant that they define the overall trip, highlighting the value and excitement of discovering new places without a fixed itinerary. It emphasizes the potential for spontaneous exploration to add depth and enjoyment to travel, making these moments memorable.