A Simple supply chain would consist of the following players.

All the above is  the apt response.......................................

A generic supply chain structure is as simple as Supplier, Manufacturer, Wholesaler and Retailer.

Please note that customer is not part of supply chain.

I CHOOSE ANSWER No(d) .................

E) All the above is the right option

Option "E" is the right answer.

>>>>>>>>>>>>>> E) All the above  >>>>>>>>>>>>>>>>>>>>>

 ANSWER IS D, C, A IN ADDITIONAL to be included supplier / Vendor

The simple Answer is that I Agree with experts Decision.

I choose option -------------------d