Which statement best describes only the characteristics of a BSL-2 laboratory?
A. Suitable for work with defined and characterized strains of viable biological agents not known to consistently cause disease in healthy adult humans.
B. Applies to facilities where work is done with agents that cause diseases of varying severity and pose a moderate hazard to personnel and the environment.
C. Includes various microorganisms that cause severe, often fatal diseases for which preventive or therapeutic interventions may or may not be available.
D. Represents a level of containment that relies on standard, microbiological best practices and procedures with no special primary barriers (e.g., BSCs).