A Disadvantage of the Mall Intercept Interview Method Is

A disadvantage of the mall intercept interview method is

A) the difficulty in finding qualified interviewers to work at relatively low salaries.
B) the lack of reliability due to changes in customer traffic during holidays.
C) the ill will it creates with shoppers who are in a hurry or looking for a relaxing mall experience.
D) the people selected may not be representative of the target market.
E) the people only participate if they think they will receive something in return,so their answers are often biased.