Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to fix sinkholes [title] Monitor the hole to see if it grows. [step] Sinkholes are often triggered by weather phenomena, such as a heavy rainstorm. Once a sinkhole has formed, though, it can continue to grow, as further portions of limestone or other carbonate rocks fall away.

Ending1: [title] Check your nearby locality, if it continues to form sinkholes. [step] Sinkholes can be potentially dangerous if you happen to happen upon them as part of a natural disaster. Ending2: Sinkholes are not necessary if you live in an area that has muddy roads. It's better if you check once a year to see if the sinkhole is larger than you expected, as sinkholes are sometimes tricky to remove and are faster to remove. Ending3: As long as a sinkhole continues to grow on a day-by-day basis, do not attempt to fill it in. [substeps] Once the sinkhole has stopped growing and remained the same size for a few days, you can fill it in. Ending4: Sinkholes are also triggered by rainfall in urban areas. [title] Test the sinkhole if it is big.

Answer format: ending1/ending2/ending3/ending4