Where did the first ever olympic games take place?.

What agreement did britain and the united states make in the treaty of 1818

How is germany's location in europe an advantage during wwii?

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.