Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to clean white walls [title] Get the room ready to clean. [step] Remove all artwork, pictures, or other items from a wall. Clear the space near the walls.

Ending1: Set up a ladder in the center of the room. Any difficult steps down the ladder can cause serious injury to your feet. Ending2: Do not wash and clean loose items; you'll have to do that later. Lay out some paper towels and the bag of flour, and put everything back in the bag. Ending3: Line the walls with black butcher paper if you're new to the art form. Paper should be the size and shape of an envelope. Ending4: Push furniture away from the walls, for example. As you'll be dusting, you should also cover your floor in a tarp to catch dust and debris as it falls.

Answer format: ending1/ending2/ending3/ending4