Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to clean pennies with vinegar [title] Gather together the pennies you want to clean. [step] Go through your wallet, drawers, car and anywhere else that change tends to pile up to find pennies in need of cleaning. This process will work best on coins that are heavily tarnished or have a lot of stuck-on grime.

Ending1: The combination of vinegar and salt will cut through dirt and buildup effortlessly. [substeps] Vinegar is most effective for cleaning copper. Ending2: It can be a safe way to take action without any major concern that a nickel will float to the surface when it is pressed up against an object. [substeps] Collect coins like pennies and nickels if necessary so you don't need to retrieve them in an emergency. Ending3: [title] Prepare a solution of baking soda and water to clean pennies. [step] Mix equal parts baking soda and water to form a thick paste that acts like a magic eraser. Ending4: [substeps] Fill your trashcan or receptacle up to the brim. Shake the coins back and forth to break them apart if necessary.

Answer format: ending1/ending2/ending3/ending4