3 What is a supply chain? (2.1)

A、Asupplychainiseverythingthatdeliversaproducttoabuyer,frompersonneltomachinestotechnology.
B、Asupplychainisthefleetofvehiclesthatdeliverproductfromfactoriestoretaillocations.
C、Asupplychainisalltheelementsofamanufacturingprocess,frommachinedesigntotransportation.
D、Asupplychainisthehierarchyofpersonnelinchargeofproducingproductsforacompany.
E、Asupplychainisthedetaileddiagramofthesalesprocess.