Final answer:
The correct answer is option D. Separated use.
Step-by-step explanation:
The occupancy type that contains multiple occupancy or use groups is known as Separated use. This occurs when a building or space is subdivided into different areas, each with its own specific use, and each area is separated from the others by fire-resistant-rated walls according to the building code requirements.
The International Building Code (IBC), for example, stipulates specific requirements for the separation of different occupancies, ensuring that fire, sound, or other hazards are contained within each use area, thus preventing or slowing the spread of hazards to other areas.
Single-use occupancy types, on the other hand, refer to a building or space that is designed for just one usage according to the building classifications. Types such as Type I, Type II, and Type III refer to different construction types that detail materials used and fire-resistance, but they do not inherently address the use or occupancy of the building.