Final answer:
Multilevel isolation indeed involves using at least two perimeters to isolate a crime scene or a biocontainment area like BSL laboratories. This multilayered approach ensures the minimization of contamination and preservation of the scene's integrity.
Step-by-step explanation:
The statement that multilevel isolation involves using a minimum of two perimeters to isolate the crime scene is true. In the context of biocontainment, such as in BSL (Biosafety Level) laboratories, multilevel isolation is crucial for preventing contamination and the spread of infectious agents. While BSL-1 represents the lowest level of biocontainment necessary due to the lower risk for microbial infection, higher BSLs require increasingly stringent protocols, which may include multiple physical barriers or containment perimeters to ensure protection of laboratory personnel and the broader community.
When applying these principles to a crime scene investigation, multilevel isolation would similarly ensure that contamination is minimized and that the integrity of the scene and evidence is preserved. Therefore, setting up multiple protected areas (a) rather than selecting one small area that is isolated from residences (b) would be a more accurate representation of multilevel isolation.