Which of the Following Best Explains the Concept of 'Supply

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

A)  Identifying saving in direct and indirect activities. 
B)  Recycling packaging materials and surplus materials. 
C)  Includes the management of materials planning, the supply of raw materials and other purchased goods, internal transportation, storage and physical distribution. 
D)  The way in which materials processes are managed within a company.