A Popular Soft Drink Company Periodically Sets Up Survey Booths

Multiple Choice

A popular soft drink company periodically sets up survey booths in various malls and grocery stores that are chosen at random.The employees working the booths ask interested individuals to fill out a very short survey on the quality of the company's drinks.While filling out the surveys,the individuals are told that a properly completed survey will be rewarded with giveaways,such as free samples,T-shirts,generous coupons,and possibly an appearance in a new television commercial.What,if any,will be the most noticeable bias?

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