Final answer:
The statement that hand washing should be done for a minimum of 90 seconds to prevent contamination of food is false; 20 seconds is the CDC-recommended duration for effective hand washing.
Step-by-step explanation:
It is false that hand washing should be done for a minimum of 90 seconds to help prevent people's hands from contaminating food. According to the Centers for Disease Control and Prevention (CDC), hand washing for at least 20 seconds with soap and warm water is recommended to help prevent the spread of germs and foodborne diseases. Frequent hand washing helps remove viruses and bacteria that can live on various surfaces and thereby prevent the contamination of food and spread of illness. It is particularly important to wash hands before, during, and after food handling, as well as other critical times like after using the bathroom or sneezing.