Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to dispose of knives safely [title] Use bubble wrap. [step] If you're going to throw your knife away, bubble wrap is your best option. This safely coats the blade, preventing injury and accident during disposal.

Ending1: [substeps] Block the blade from view during application. Unfold the bubble wrap, covering it completely. Ending2: [substeps] You might want to wrap the knife in butcher paper first. Then, wrap the knife in a few layers of bubble wrap. Ending3: It's also good for protecting against infection, which is typically caused by ingrown hairs. Use a protective glove or several layers of gloves during disposal of your knife and dispose of it properly. Ending4: Use a clean, dry towel to wrap around your knife. [substeps] Security will discuss safety regulations with you during disposal.

Answer format: ending1/ending2/ending3/ending4