Please choose the correct ending to complete the given sentence: Work World: [header] How to reduce cubicle noise [title] Extend your cubicle walls upwards. [step] Your cubicle will let in less noise if the walls are higher. Order some cubicle wall extenders from an office furniture store, or talk to your office manager about getting some.

Ending1: [substeps] Find wall extensions for sale online by doing a search for " cubicle wall extender " or " cubicle privacy panel. " [title] Put soundproof paneling on the walls. Ending2: You can encourage more noise with higher level cubicle walls. [substeps] Curtains and blinds are another convenient and simple alternative to cubicle wall extenders. Ending3: The deeper your cubicle wall, the more noise you'll hear. [substeps] Ask your supervisor if your cubicle walls are able to lower the amount of noise it receives. Ending4: [substeps] If you prefer not to go up and down your wall, then these desks may be space-tight and you may need to space them out further. A barrier will keep noise downstairs, up the exterior wall of your office, and between the walls of your cubicle.

Answer format: ending1/ending2/ending3/ending4