Ricky is an online golf equipment merchant who just created a new google merchant center account. when ricky creates his first data feed, he must add unique product identifiers for his products. which combination of gtin, mpn, and brand should he submit?

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.