What are three requirements for interior surfaces in an apparatus?

The correct answer emphasizes the specific functional requirements for interior surfaces in an apparatus, particularly in contexts related to health and safety. Fire resistance is critical to prevent and mitigate fire hazards, particularly in environments handling flammable materials or processes. Being inert to disinfectants ensures that the materials used will not react negatively to cleaning agents, which is essential for maintaining hygiene and safety standards. Inertness to detergents and solvents is similarly important, as it prevents any degradation or chemical reactions that could compromise the integrity of the materials or pose risks to user safety.

The other options present various characteristics that might be desirable in specific contexts, but they do not encompass the essential requirements for safety and compatibility with health protocols typically expected in apparatus design. For instance, while being durable or inexpensive is important in many situations, these attributes do not directly address the chemical and fire safety concerns that option B covers. Similarly, factors such as being colorful or ergonomic, while potentially enhancing user experience, are not as critical in the context of health and safety compliance. Non-slip, glossy finishes, and waterproof characteristics are also valuable but do not align with the foundational requirements for interior surfaces in terms of fire and chemical interactions.