Which of the Following Is True Concerning the Value Chain

Which of the following is true concerning the value chain of business functions?

A) Managers should always proceed sequentially through the value chain, since distribution, for example, cannot occur before production is completed.
B) Senior managers from individual parts of the value chain do not have a responsibility in deciding on the organization's overall strategy.
C) An organization can only realize gains from having individual parts of the value chain work sequentially.
D) The value chain refers to the value added to the customer from marketing.
E) Senior managers from individual parts of the value chain have a responsibility in deciding how resources are to be obtained and used, and how rewards are to be given.