Answer:
D. Network
Step-by-step explanation:
Network structure: It is an organizational structure, which does not have a hierarchical or flat structure rather it is more decentralize and flexible structure than any other organizational structure. This structure relies more on open communication and reliable partner outside the organization, which reduce liability and department to have more control and lesser flaws in management. Many third parties, informal networks, agents are involved in the network structure of the organization.
In the given case, the company has contracts with staffing agencies to fill non core positions from accountants to dishwashers, which is an example of network structure.