Answer:
The correct answer is letter "D": All of the above.
Step-by-step explanation:
Value Chain refers to the company conducting interrelated operational activities during the process of turning raw materials into finished products. Once a company has identified what activities into the value chain bring the highest added value, the firm should attempt to improve those activities to reach perfection. But there could also be activities providing low added value, thus, the company must pay special attention to those as well for corrections to be made.