Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to can pumpkin [title] Choose glass canning jars that are in good condition. [step] The jars should be free of cracks or chips to prevent any air from bleeding in after the canning process and to prevent the glass from breaking under pressure. They should also have metal lids that screw on securely.

Ending1: They should not have any lids that pierce holes, are painted or screwed on in order to prevent leaks, and are not painted or chemically treated. [title] Choose jars with easy to clean lids. Ending2: Two-piece lids tend to have the best seal. [title] Wash the jars and lids with soap and water. Ending3: [substeps] You can also use lids that are rigid, have small holes, and have structural embellishments. [title] Use canning jars that have cedar or oatmeal insoles. Ending4: Plastic canning jars are best because they also keep fresh nitrates and ammonia from the canning process into the pumpkins. [substeps] Glass canning jars should have plastic lids that screw on securely.

Answer format: ending1/ending2/ending3/ending4