Expedia's Web Page Shows a List of Car Rental Companies,and

Expedia's web page shows a list of car rental companies,and when Expedia customers click on,say,the Dollar banner for a car rental,they are transferred from the Expedia site to the Dollar site.Dollar pays Expedia a fee for each booking that comes through this channel.This is an example of

A) direct response retailing.
B) syndicated selling.
C) shopping agents.
D) electronic retailing.
E) electronic catalogues.