Answer: c. It allows managers and workers to specialize in one area of expertise.
Explanation: Product departmentalization is when all activities and workers involved in making a product are grouped into one department such that they are overseen by one manager. The advantages include specialization by managers and workers as they focus on just one product. This enables them to have an in-depth knowledge of the product.
One of the disadvantages of Product departmentalization is duplication, which in turn increases cost.