Please choose the correct solution to the question: How can you tell if a sink hole has stopped growing and can be filled?

Solution1: 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.

Solution2: 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 format: solution1/solution2
Answer: solution2