How can food become contaminated during preparation?

Food can become contaminated during preparation primarily due to improper food storage and handling. When food is not stored at the correct temperatures, harmful bacteria can multiply, leading to foodborne illnesses when the food is later consumed. Additionally, improper handling practices, such as not washing hands before food preparation or using the same cutting board for raw meat and vegetables, can introduce pathogens into the food.

Using spoiled ingredients is a specific instance of contamination but not the only pathway. Similarly, while the use of dirty cooking utensils can also introduce contaminants, it is more related to improper handling practices, which encompass a broader range of potential issues. Serving food too hot does not lead to contamination in the same sense; rather, it relates to ensuring food quality and safety in terms of temperature management. Therefore, the comprehensive perspective regarding food safety makes improper food storage and handling the correct answer, as it includes a wide array of practices affecting food safety during preparation.