Question

storing food on shelves at least 15 cm (6 inches) off the floor will help to: keep food fresh prevent contamination of food make room for chemical cleaners none of the above

Explanation:

Storing food on shelves at least 15 cm (6 inches) off the floor helps prevent contamination. This is a common practice in food safety to avoid contact with dirt, pests, and moisture on the floor. Keeping food fresh is more related to storage conditions like temperature and packaging. Making room for chemical cleaners is not the main purpose. Since one of the options (prevent contamination) is correct, "none of the above" is incorrect.

Answer:

prevent contamination of food