Here's a problem to solve: A town built a road through a forest. Deer live in the forest on both sides of the road. Which would not help protect deer from the cars on the road?

Among the 4 following options, which is the correct answer?

- A: feeders on the side of the road
 
- B: lights along the side of the road
 
- C: signs telling drivers to be careful of deer
 
- D: bridges that let the deer walk under the road
 