The father of a junior high school student wants to determine the most popular book among junior high students. Select the sample with the least potential bias.

A. A randomly selected group of 10 book sellers

B. A randomly selected group of 30 junior high students

C. A randomly selected group of 30 junior high students leaving the public library

D.

The group of 30 junior high students attending the birthday party of the
researcher’s child

id it D

3 answers

No.
Then the only one making sense to me is C
But students coming out of a library presumably read mostly library books.

What about B?