Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to protect a basement from flooding [title] Get a propane or natural gas generator. [step] Do not waste your time buying a gasoline powered generator. You will have to be at home at the time of the power outage to start it.

Ending1: [substeps] This generator should be at least 10 ft (4.6 m) or less. One gallon (3.7 l) of propane, combined with a common gas, is likely to have a significant footprint on your basement. Ending2: Electricity goes directly into your basement and should be replaced every 10 days for at least 5 years. You should also make sure the generator is rated with the appropriate efficiency and appropriate waste content. Ending3: Above all else, you want to make sure that you water the basement well in case of a fire. [title] Check the system often to make sure that there are no electrical issues. Ending4: You'll also have to keep returning to your home to add gasoline. [substeps] There is a wide variety of propane or natural gas generators that run automatically when your power goes out.

Answer format: ending1/ending2/ending3/ending4