How long do low mass stars live

Which of the four varnas are soldiers placed in? a. sudra b. brahmin c. vaishya d. kshatriya

During he 1840s, more americans than british settled in the oregon country. how do you think this settlement influenced negotiations with the british over the territory

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.