Define a free rider. How does the government address the issue of the free-rider?

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.

What caused the american indians to relocate in the late 1600’s,

It is impossible for a person to throw beanbags in a way that is not reliable and not valid. reliable but not valid. not reliable but valid. reliable and valid.