The correct answer to this question is D, 30 seconds. When a person washes their hands, they should do so with luke-warm water and soap. Water is essential for several different reasons, both warm and cold. However, when it comes to washing hands, warm water is best.
It is better than using cold water because it kills germs and bacteria. Water alone is not enough, though. Soap should also be used to kill any bacteria and germs that are on a person's hands. Everyone should use these techniques when washing their hands, but especially those in the health care environment, who are around germs all day.