Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to keep brown sugar soft [title] Store brown sugar in an airtight container. [step] Brown sugar tends to get hard due to air exposure. If you want to keep brown sugar soft, you're best option is to store your brown sugar in a sealable, airtight container as soon as you open it up.

Ending1: [substeps] If you do not keep this type of container, you should store brown sugar in the refrigerator for several days after opening it, at room temperature. [title] Preserve brown sugar in an airtight container. Ending2: Next time you open it up, make sure there is no air in it. Otherwise, you may end up with less brown sugar sugar. Ending3: [substeps] Limit air exposure as much as possible when storing brown sugar. Choose a smaller container and pack the brown sugar to the top. Ending4: Just sealing the container will keep your brown sugar soft and firm for up to two days. [title] Store processed items packaged as brown sugar.

Answer format: ending1/ending2/ending3/ending4