Which of the following is a sign of a pest problem?

A sign of a pest problem is the presence of pest corpses. Finding dead pests in food preparation or storage areas indicates that pests have been active in that environment, suggesting a potential infestation. It is crucial for food handlers to recognize this sign as it can lead to food safety issues and the need for pest control measures.

The other choices do not indicate pest activity. Freshly painted surfaces may help improve the aesthetics of an area but do not signify any pest-related issues. Clean floors and uncluttered spaces reflect good hygiene and organization practices, which typically help in preventing pest problems rather than indicating them. Recognizing the signs of pest issues, like pest corpses, is essential for maintaining food safety and ensuring a safe environment for food preparation and service.