Advice columnist Ann Landers once asked her readers with the children to answer the following question: "If you had it to do over again, would you've children?" Readers were invited to send the response to this question by mail. Of the approximately 10,000 responses Landers received, approximately 70% said "no."
The sample
A. is probably representative of all parents.
B. is probably not representative of all parents because people who feel very strongly about this issue are more likely to respond than people who do not.
C. has little bias since more than 10,000 people responded, yielding a very large sample.
D. is probably not representative because more than 10,000 people responded.