Answer:
look for egg castings, small dropping that look like black pepper grains, and strong oily orders.
A food worker is a person that works in the food industry. He should inspect small black droppings in a dry food storage area for signs of a pest infestation. Thus, option D is correct.
Pest infestation are the invasion of the food and other material by the pests that destroy the food and can lead to diseases by infecting them with harmful microbes.
In dry food storage, the small black droppings must be checked for any sign of pest infections. As this might be the clue that there are rats or other insects in the place.
Therefore, the small black droppings are the signs of pest infestation.
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