Which term best describes data that already exists, collected for another purpose that can be used to address a research problem

According to the video, two of the ways government can play a role in the economy is by protecting property rights and to

These facilities were organized and sponsored by churches or charities during the great depression in an effort to feed the homeless and needy.

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.