Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to store a propane tank outside [title] Don't leave your tank inside or in a shed. [step] If gas were to leak, it would contaminate the area and make it dangerous. Even the spark of starting a vehicle or lawn mower could ignite a propane leak.

Ending1: [substeps] If you live in a snowy area, mark the location of your tank in case it gets buried so you can easily find it and clear away snow. [title] Store the tank in a dry, well-ventilated outdoor area. Ending2: Leaving your tank in a shed in the rain not only causes a large mess, but increases chemical fire hazards. [substeps] After leaving your tank in the rain, inspect it for any dirt, insects, dead or dying plants, or small trash. Ending3: [title] Wear common safety precaution-leave the tank standing inside or outside when inside. [step] Don't reach in or touch any of the bottom parts of the tank. Ending4: Other types of building materials, such as concrete blocks, are highly flammable and make the propane leaking now more potentially hazardous. [substeps] If your propane tank is inside, inspect the area before leaving.

Answer format: ending1/ending2/ending3/ending4