You want to do a survey on how religious people are in your town. what do you need to have a valid scientific sample? check all that apply. a. people who go to church b. a sample of the students in school c. a random sample of the towns population d. a mix of participants that reflect your towns makeup

Which of the following  bestillustrates a negative reinforcer?               a.  copland gives up candy to stave off chronic acid indigestion.    b.  nancy learns that she prefers chocolate over vanilla.    c.  carmine changes his major to english lit after failing a math exam.    d.  on a hot day, lindberg always drinks lemonade.