If oil is being overheated repeatedly in a food business, what is the main concern?

Correct answer: Oil quality and food safety may be affected

The direct answer is B: oil quality and food safety may be affected. Repeated overheating can break down oil, produce unpleasant smoke or flavours, darken the oil, reduce food quality, and create potentially harmful degradation products. The exact risk depends on the oil, temperature, cooking time, and number of heating cycles, so the safe lesson is to control heat and replace oil when it shows signs of deterioration. Option A, food aroma will always increase, is wrong because overheating can create burnt or unpleasant smells rather than a better aroma. Option B is correct because both the quality of the oil and the safety of the food can be compromised. Option C, cost will always become zero, is absurd; even reused oil has purchase, storage, labour, and waste costs. Option D, there will never be customer complaints, is false because poor taste, smell, appearance, or health concerns can cause complaints. Staff should avoid excessive heating, filter or store oil appropriately when permitted, monitor its condition, and discard unsuitable oil. Memory cue: repeated overheating means quality and safety warning.