Which survey is most likely affected by bias?

a. A survey of teenagers about their favorite colors

b. A survey of students about vacation policies in a school district

c. A survey of supermarket shoppers about products they would like to see added

d. A survey of bike riders on whether they wear helmets

Answer:- b. A survey of students about vacation policies in a school district

Step-by-step explanation:

Biased since of what they would want not generally school. This survey possibly will be affected by bias, since students may have a preference for longer set. a survey of students about vacation policies in a school district.