Final answer:
Grouping jobs (C) is the basic building block to use when building departments focused on specific products or clients, as it allows for specialization and improved coordination.
Step-by-step explanation:
To build departments focused on specific products or clients, the basic building block of structure you would use is Grouping jobs (C). This approach organizes jobs into departments based on similar products or services, customer groups, or processes.
It is an effective way of aligning a company's structure with its strategy, allowing for specialization and improved coordination within product lines or client groups. Specialization enables workers to focus on the parts of the production process where they have an advantage, leveraging their skills, talents, and interests more effectively.