__ are most resistant microorganisms to disinfection A. Prions B. HIV C. Helminths D. Enveloped viruses

The correct answer is A. Prions.<br /><br />Prionsfolded proteins that can cause a variety of neurodegenerative diseases. They are highly resistant to disinfection methods, including heat, radiation, and chemical disinfectants. This resistance is due to their unique structure and the fact that they do not contain nucleic acids, which are typically targeted by disinfectants. Therefore, prions are considered the most resistant microorganisms to disinfection among the options provided.