Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to put on a cleanroom suit [title] Cover your hair. [step] One of the easiest ways to noticeably contaminate an area is by shedding hair. Hair falls from your head to the floor or work surface.

Ending1: Holding your hair up with your hands is a sure way to mask those strands. Consider covering your head with your hands to catch hair falling onto the floor. Ending2: To avoid this, cover your head in a paper towel or a gym hat. [substeps] Avoid greasy hair by covering your hair with a shower cap and wrapping your hair up in a paper towel. Ending3: Cover your scalp with a combination of layers of clothing or make a sheer covering from a towel, shatea, or a shower cap. You can also create fabric veil, which comes close to covering your entire head to protect your face from extremely cold, dry air. Ending4: With it come proteins and bacteria that will contaminate the cleanroom. You will be required to wear a hood or hairnet of some kind to prevent any hair from falling in the cleanroom (this includes facial hair).

Answer format: ending1/ending2/ending3/ending4