What signs may indicate that food has gone bad?

• A. Sweet smell
• B. Bright color
• C. Off smells, discoloration, and changes in texture
• D. Cooling quickly

Answer: (C)

The correct choice highlights several key indicators that food may have spoiled. Off smells are typically the first sign that food is no longer safe to consume; these odors can include sourness, rancidity, or a generally unpleasant scent that differs from the food's normal aroma. Discoloration is another important sign; for example, fresh fruits and vegetables may turn brown or develop dark spots, while meat might exhibit a duller hue. Changes in texture, such as sliminess on chicken or a wilted appearance in greens, are also reliable indicators of spoilage.

In contrast, options like a sweet smell or bright color may not necessarily indicate spoilage. Certain foods, like ripe fruits, can have a sweet smell that is normal, and bright colors can sometimes signify freshness. Cooling food quickly is also not a sign of spoilage; in fact, it is a recommended practice for food safety to prevent bacterial growth. Therefore, the combination of off smells, discoloration, and changes in texture serves as the most accurate signs of food going bad.