Question

how high must food be stored off the floor? 5 cm (2 inches) 15 cm (6 inches) 30 cm (1 foot) no minimum height off floor

Explanation:

Food storage regulations often require a minimum height to prevent contamination from floor - level dirt, pests, etc. A height of 15 cm (6 inches) is a common standard. 5 cm is too low to effectively prevent such issues. 30 cm is higher than the typical minimum. And "No minimum height" is incorrect as there are hygiene - related storage requirements.

Answer:

15 cm (6 inches)