Final answer:
Managers use a market structure when organizing divisions based on the type of customer they focus on.
Correct option is C.
Step-by-step explanation:
When managers organize divisions based solely on the type of customer they focus on, they use a market structure. A market structure involves organizing divisions or departments within a company based on the specific market or customer segment they serve. By structuring the organization this way, companies can allocate resources and tailor strategies specifically to meet the needs of different customer groups.