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Which of the following is NOT considered to be "cross-contamination"?

A Leaving foods in the temperature danger zone for too long.

Explanation: Cross-contamination occurs when a food or a food-contact surface comes into contact with something that is contaminated. One example is when an employee who was handling raw foods then handles ready to eat foods or surfaces that will come into contact with ready to eat foods - without first washing their hands or these surfaces. Another example is when raw foods requiring a higher cooking temperature come into contact with foods requiring a lower temperature of cooking. This can also happen indirectly, such as using the same utensils, cookware or surfaces for foods requiring different temperatures of cooking. Cross-contamination can further be prevented with good personal hygiene and cleaning/sanitizing methods.