Final answer:
A sign is required to be displayed at all handwashing sinks to promote proper handwashing hygiene. It includes instructions on how to properly wash hands.
Step-by-step explanation:
In order to promote proper handwashing hygiene, a sign is required to be displayed at all handwashing sinks. This sign serves as a reminder to individuals to wash their hands thoroughly. The sign typically includes instructions on how to properly wash hands, such as wetting hands with clean, running water, applying soap, lathering for at least 20 seconds, rinsing thoroughly, and drying hands with a clean towel or hot air blower.