Which of the following would not be considered a commodity?

cotton
onions
shirts
timber

Aryans believed that the most important thing in life was warfare. if this statement is true, which of the following facts best supports it?

Idont know any of these can anyone me

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.