Retailers sell products to?

 c) End users.....................................

 End users"""":::::::::::::::::::::::::::::::::::::

CHOOSE            C      -----------------------------------------------------

a, b, c and d.  Theoretically it is to end users. 

Retailers sell products to end users.

products  retailers comes from wholesalers and manufacturers and sold to end users

Option (C)

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My answer is an option (C) End Users

Not at all..Becuse we all know that CHINA makes a name to the work for making such good thing,especially to medicine and gudgets.

>>>>>>>>>>>>>>>>>>>>   c) End users

Normally retailers get the goods from warehouses and wholesalers to be distributed to end users or consumers