Which of the Following Statements Best Explains the Value Chain

Which of the following statements best explains the value chain model?

A) The value chain is a model for evaluating the linkages between the various departments that make up the organisation.
B) The value chain is a model for evaluating how value is added at all stages in the industry supply chain.
C) The value chain is a model for evaluating the cost and value of the various activities performed by an organisation and how these activities are interlinked.
D) The value chain is a model for evaluating which of an organisation's suppliers offers the best value for money.