Answer: (C) Controlling
Explanation:
The controlling is one of the type of management function that helps in managing the various types of organizational function and also it helps in achieve the desirable goals.
It basically take various types of corrective actions for effectively managing the resources and also helps in improving the performance of the company.
According to the given question, the controlling is one of the management function that efficiently illustrating the given scenario.
In the vermilion inc, the top management of the company realized that at the time of construction of the plant shows some technical defects and the technical specialists of an organization try to resolve the given issue.
Therefore, The given process is known as the controlling management function.