The word "scouts" ( Line 8, Para. 2) probably means" ______.

A．The Inherent Weaknesses of the Price System.
B．Credit Terms in Transactions.
C．Resource Allocation and the Public Sector.
D．The Complexities of the Price System.

A．types of payment plans for service
B．unusual ways to advertise products
C．how certain elements of a price "package" influence its market value
D．theories about how products affect different levels of society