What are the two most common causes of contamination in food preparation?

• A. Cross-contamination and time-temperature abuse
• B. Improper utensils and insufficient cooking
• C. Irradiation and freezing
• D. Under-seasoning and overcooking

Answer: (C)

The main idea is how contamination typically enters foods during preparation. The two most common pathways are cross-contamination and time-temperature abuse. Cross-contamination happens when pathogens move from one surface or food to another—think raw meat touching cutting boards, knives, or hands that then touch ready-to-eat foods. Time-temperature abuse occurs when food is left in the temperature danger zone (roughly 40°F to 140°F) too long, allowing bacteria to multiply quickly or toxins to form. Other options don’t describe the usual routes: improper utensils and insufficient cooking can contribute, but they don’t capture how contamination most often spreads; irradiation and freezing are methods that reduce contamination, not cause it; under-seasoning and overcooking don’t directly introduce pathogens.