Inside the Boxes of a New Brand of Cereal,is a Short

Multiple Choice

Inside the boxes of a new brand of cereal,is a short survey that can be mailed back for free to the manufacturer.The survey asks the consumer if he or she likes the cereal or not.What,if any,will be the most noticeable bias for this survey?

A) Undercoverage of the population
B) Nonresponse bias
C) Response bias
D) Voluntary response bias
E) There does not seem to be any bias.