What are common signs of food spoilage?

Food spoilage often presents itself through several distinct indicators, making option B the correct choice. Off-odors are a primary sign of spoilage, as bacteria and other microorganisms break down food substances, leading to unpleasant smells. Discoloration is another critical sign; for example, fresh produce may develop brown spots or an overall dull appearance, indicating that it is no longer fresh. The presence of mold, which appears as fuzzy or slimy growths, is a clear indicator that the food should not be consumed, as some molds can produce harmful toxins.

In contrast, other options suggest conditions that relate to freshness rather than spoilage. Bright colors and strong flavors are typically associated with fresh food, not spoiled items. A firm texture and freshness are characteristics of food that is still safe to eat. Lastly, a cool temperature and proper packaging can help preserve food and deter spoilage but do not inherently indicate spoilage themselves. Thus, recognizing the signs of off-odors, discoloration, and mold is crucial for identifying spoiled food effectively.