According to reports, compared with foreign countries, the concentration of antibiotics in Chinese rivers is higher, the measured concentration is up to 7560 ng / l, and the average is also 303 ng / l, while Italy's 9 ng / l, and the United States is 120 ng / l In Germany, it is 20 ng / L. Some experts think it is not a concern. Because the minimum inhibitory concentration of most antibiotics on pathogenic bacteria is above 10,000 ng / L, the concentration of antibiotics currently detected in rivers and soils in China Both are less than the minimum inhibitory concentration of various antibiotics on bacteria. Which of the following is an assumption made by the above experts? ['If the antibiotic concentration is lower than its minimum inhibitory concentration on the germs, the germs will not develop resistance.', 'Many patients need to use more next-generation antibiotics to control infections and illnesses.', 'If the bacteria have sexual properties, it is difficult to cure the disease caused by bacterial infection with antibiotics.', 'Higher concentrations of residual antibiotics taken through the environment may actually help to maintain human health.']