A Weight-Loss Company Is Trying to Promote Its Product

Multiple Choice

A weight-loss company is trying to promote its product. Based on a sample of 10 of their clients they model the relationship between starting weight and weight after 4 weeks using their product. It turns out that these 10 clients were selected because they had lost a decent amount of weight in 4 weeks. Clients who had lost hardly any weight or even gained weight were not included for this study. The results of this study, if applied to all clients, are questionable because of

A) lack of accuracy.
B) selection bias.
C) nonresponse bias.
D) response bias.