Tina lives in a part of the U. S. where very expensive jewelry is popular among high school girls. Many girls pressuring their parents to buy them diamond rings. This is an example of:

According to the aztec history, how did the aztecs know where to build their new city of tenochtitlan? why was this a good location?

This description of the "firm league of friendship" of states is a quotation from the

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.