posted by Amy .
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
The group of 30 junior high students attending the birthday party of the
id it D