Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to care for a library book [title] Wash your hands before touching your book. [step] The slightest bit of dirt or oil on your hands can discolor or damage the pages and binding. Work up a good lather with the soap.

Ending1: [substeps] Grab a shirt from your room closet or under a table. Apply some soap to your hands before touching a book, to ensure that you wash your hands properly. Ending2: Rub your hands together in a circular motion, then fill a bowl or container with your chosen scrubbing products. Use a thick cloth to keep your hands sanitized. Ending3: Focus on your fingertips and the palms of your hands. Rub your hands together long enough to sing the " happy birthday " song. Ending4: Rinse your hands under warm running water for at least five minutes. [substeps] Pay attention to your hands, particularly on interesting pages.

Answer format: ending1/ending2/ending3/ending4