Which of the Following Explains the 'Value Chain Margin

Multiple Choice

Which of the following explains the 'Value Chain margin'? 

A)  Composed of value activities and a margin which is achieved by these activities. The margin represents the value that customers want to pay extra for the company's efforts compared with the costs that were required for these. 
B)  Composed of value activities which can be divided into primary activities and support activities. 
C)  Composed of value activities and a margin which is achieved by these activities. Value activities can be divided into primary activities and support activities 
D)  Composed of value activities and a margin which is achieved by these activities.