Walmart's Customers Have Come to Expect to Find P&G Products

Multiple Choice

Walmart's customers have come to expect to find P&G products in stores,and P&G depends on Walmart to purchase a good portion of its output to sell to its own customers.This scenario represents the first phase of a

A) quick-response system.
B) virtual marketing system.
C) horizontal marketing system.
D) vertical marketing system.
E) reward marketing system.