Customers Can Build Their Own Computers with Dell's Online Configurator

Customers can build their own computers with Dell's online configurator. They simply have to answer a few questions and choose from a menu of product attributes, prices, and delivery options. The design of a Dell customized computer is made possible through the use of a

A) choiceboard.
B) permission-based e-mail.
C) cookie.
D) bot.
E) collaborative filter.