Question

which selection method is not a volunteer sample?

Answer 1

A people who stop at the website are asked to answer a question.
B One teen from each grade is chosen to answer survey.
C People who subscribe to a magazine are asked to send in a survey.
D Radio listeners are called in to answer a question.

Answer 2

B

Answer 3

why B ? can you explain please ?

Answer 4

Look at all the samples. All the samples are asking people to do something hints volunteer but B is chosen and not giving the people a chance to decline. All the rest are willingly giving their time.

Answer 5

ty :)

Answer 6

yw