Sampling Error Occurs When

Sampling error occurs when

A) a whole generation of voters uniformly believe that something is based on a commonly shared experience.
B) socioeconomic status influences what types of answers are given in a survey.
C) an interviewer presents survey questions with a good deal of bias.
D) there is a difference between the sample result and what the sample really responded.
E) there is a difference between a sample result and the true result if the entire population had been interviewed.