Answer:
C. function
Step-by-step explanation:
The plant is departmentalized on the basis of function. When the department is organized on the basis of specified functions, such as accounting, engineering, manufacturing, marketing, purchase, finance, etc as a plant manager is organizing here is known as Departmentalization by Function. In this method, all the works related to a function or which are of similar nature are joined in one single unit, to give proper directions to the whole group towards same objective.