Michael is writing an article for the school newspaper. He wants to know which subject (math, reading, science, history, or physical education) is most liked. He is trying to decide who to survey.

Which population sample does NOT produce a biased result?

A. He asks the school’s teachers
B. He asks his friends after school
C. He asks the students in his math class
D. He asks students he meets in the hallways
E. He asks every fifth student arriving at school