Which of the Following Best Explains the Concept of 'Converging

Which of the following best explains the concept of 'converging supply chain'? 

A)  The finished product of one link is the main or sole input for the next production stage of various other industry columns. 
B)  The finished product of one link is the main or sole input for the subsequent link. 
C)  Various finished products of links of various supply chains are the input for the next link. 
D)  A company producing a diverse range of products.