You are presented with the quiz "Irradiating food can do which of the following?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "irradiating food can be used to kill existing microorganisms in the food" and "bacterial microorganisms are representative of these biological factors, and e-coli food poisoning is a good example". 

So, what's the best answer to the question?


 

      Kill e-coli bacteria     