Which of the following is a common material storage occupancy?

The choice of lumber yards as a common material storage occupancy is appropriate because lumber yards are specifically designed for the storage and distribution of timber and related materials. They typically involve large open areas where wood products are stored in bulk, making them distinctive in their purpose of storing substantial quantities of materials. The layout and operations in a lumber yard are focused on efficiency in handling, storing, and possibly processing wood, all of which are key characteristics of material storage occupancies.

In contrast, manufacturing plants may also involve material storage, but they are primarily focused on the processing or production of goods, rather than just storage. Offices are designated for administrative and managerial functions, lacking the characteristics typical of storage. Residential buildings are meant for living purposes, and they do not primarily relate to the function of material storage, making them unsuitable for classifying as common material storage occupancies.