A Company Sells a Mattress That It Claims Promotes Good

A company sells a mattress that it claims promotes good health.It also convinces customers to become part of a club where they receive commissions if they get other people to join the club or buy mattresses.This is an example of:

A) bid rigging.
B) bait-and-switch.
C) predatory pricing.
D) referral selling.
E) pyramid selling.