Finish the following sentence with the best choice: How can you tell if a sink hole has stopped growing and can be filled?

Choices:
- Take a pole or stick and throw it in the sinkhole. Note how deep and wide it is. Do this daily until the measurements stop changing.
- Take a pole or stick and probe around in the sinkhole. Note how deep and wide it is. Do this daily until the measurements stop changing.

Answer:
Take a pole or stick and probe around in the sinkhole. Note how deep and wide it is. Do this daily until the measurements stop changing.