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Answer:
C. by controlling which microorganisms are in food
Explanation:
Biotechnological methods of preserving and storing food help ensure that the food stays safe to eat by controlling the types of microorganisms present in the food. By selecting beneficial microorganisms, inhibiting the growth of harmful ones, or using natural preservatives produced by microorganisms, these methods help maintain food safety and quality. This control over the microbial composition of food is crucial in preventing spoilage and contamination, thereby ensuring that the food remains safe for consumption.