Most antibiotics used in the world are consumed by farm animals, who are often fed these medicines to promote growth or to prevent disease, not because they are afflicted with a specific illness. Any use of antibiotics contributes to the development of pathogens that are resistant to it, and many antibiotics that were once effective in promoting human health have lost their effectiveness because of the development of resistant strains. Worldwide, antibiotic consumption by farm animals continues, and at the current pace is expected to render more and more antibiotics ineffective. What kind of market failure is this? (O Market power (O Moral hazard (O Externalities (O Adverse selection (O Animal power