Antibiotic resistance is becoming common among organisms that cause a variety of human diseases. All of the following strategies help reduce the risk of antibiotic resistance evolving in a susceptible bacterial population except _________.

A. Using antibiotics only when appropriate, for bacterial infections that are not clearing up naturally;

B. Using the drugs as directed, taking all the antibiotic over the course of days prescribed;

C. Using more than one antibiotic at a time for difficult-to-treat organisms;

D. Preventing natural selection by reducing the amount of evolution the organisms can perform;

E. Reducing the use of antibiotics in non–health-care settings, such as agriculture