Food Producers Love Big Boxes Because They Serve as Billboards

Food producers love big boxes because they serve as billboards on store shelves.Wal-Mart wants to change this practice and promises suppliers that their shelf spaces won't shrink even if their boxes do.As a result,some of its vendors have reengineered their packaging.This is an example of _____ integration.

A) relationship
B) social
C) functional
D) operational
E) material and service supplier