NY LI- M/J Grade 7 Mathematics V14. Amy Parola ( 4027/ S) Montague Strickland Question 3 Multiple Choice Worth 5 points) (08.01 MC) A researcher places a radio advertisement offering $32 in exchange for participation in a short study. The researcher accepts the first nine people who respond to the advertisement. Which of the following statements is true about the sample? O It is a valid sample because the first nine people were selected to participate. O It is not a valid sample because it is not a random sample of the population. O It is a valid sample because money was offered to participants. O It is not a valid sample because it is only a short study.​