Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to pasteurize [title] Set up a double boiler. [step] Fill the bottom pan of a double boiler with approximately 2 inches (5 cm) of water. Place the smaller, top pan into the first.

Ending1: [substeps] If you do not have a double boiler, you can use the combination of a large stockpot and a small saucepan, metal bowl, or thick glass bowl. The smaller dish must be small enough to fit into the larger stockpot. Ending2: Place a smaller heat-safe pot or container, such as a saucepan, on top of the larger, shorter. This will add the water to the larger pan that you'll place it inside. Ending3: [substeps] It is difficult to use the pan to actually pour in the water. Place the pan on a baking sheet so that the water is contained inside. Ending4: [substeps] Fill the bottom pan half with water. Place the larger pan on the stove burner over medium heat.

Answer format: ending1/ending2/ending3/ending4