With Respect to Retailing, What Is the "Party Plan

With respect to retailing, what is the "party plan"?

A) A sales representative has a party at her home to demonstrate products to a group of friends and associates.
B) A party is set up in a formal setting to demonstrate a product and provides free samples of the product to all in attendance.
C) An individual is asked to tell two friends about a product, who are in turn each asked to tell two friends, etc. until a sufficient number of people are reached.
D) A store has a special sale that resembles a party, and those who come are asked to buy the featured products.
E) A consumer acts as a host and invites friends to view merchandise in a group setting, where a salesperson demonstrates the products.