For decades, people have invented a variety of drugs to poison mice, but people have found that the method of placing rat drugs in places where rats often go in and out is becoming less effective, whether people add drugs to rats. When it comes to how delicious food, mice will ignore these "delicious" sent. According to this phenomenon, the possible explanation is: mice have extremely sensitive smells, they can distinguish from any complex smell harmful to them Substance. Which of the following most strongly suggests that the last explanation above is wrong? ['Rats rarely go to places where rat pills have been placed.', 'Rats can tell if food is poisonous by eating before eating.', 'Scientists have shown that mice have developed resistance through a series of tests.', 'Place any food in the place where the drug was previously placed and the mouse will not eat it.']