Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to remove oil stains from carpeting [title] Cover the stained area with baking soda or corn starch. [step] Sprinkle the powder liberally and don't worry about using too much. Both baking soda or corn starch are absorbents that will " soak up " moisture, especially oil.

Ending1: [substeps] Shake up the mixture and mix it with a toothbrush. Scrape any excess baking soda from the surface with a damp cloth or paper towel. Ending2: They will not stain or damage carpeting. [substeps] One advantage of baking soda or corn starch is that they are very inexpensive. Ending3: This means that baking soda and corn starch have very similar properties, even if they're not the same type of stain. [title] Allow the baking soda to sit for two hours or overnight. Ending4: If you apply baking soda directly to the stained portion of carpeting, the whole rag can start to absorb oil. While baking soda is technically optional, it's one of the more convenient ways to remove oil stains.

Answer format: ending1/ending2/ending3/ending4