Which of the Following Explains 'Supply Chain

Multiple Choice

Which of the following explains 'Supply Chain'? 

A)  A series of companies (links) in which the consecutive stages of production of an economic product take place, from primary production to final consumer 
B)  A series of companies (links) in which the consecutive stages of production of an economic product take place from primary production. 
C)  A series of companies (links) in which the consecutive stages of production of an economic product take place. 
D)  A series of companies (links) .