Finish the following sentence with the best choice: What should you do before you begin filling a sinkhole?

Choices:
- Remove any loose debris that may be in the sinkhole: tree branches, pine cones, etc.
- Add debris to help fill the sinkhole up: tree branches, pine cones, etc.

Answer:
Remove any loose debris that may be in the sinkhole: tree branches, pine cones, etc.