Answer:
Road Trips or the benefits of driver training courses
Step-by-step explanation:
A narrow topic is: A topic that focuses mainly on one thing
Truck drivers is too narrow because not everyone drives a truck. Unlicensed drivers would probably be good for learning to drive topic. So is benefits of driver training courses. So i think the best choice is Road trips because when you drive you go on road trips so that will make the paragraph interesting. Road trips can have many destinations so that makes it have many concepts. It also isn't to broad because you can find enough information about road trips with out making it crowded
Note: I am not 100% sure so think about what i said first and I hope this helped.