"Your answer must be wrong" a fellow classmate says. "The question is asking about the long run, but you say both the price level and real output change. That can't be true -- only prices change in the long run!" Your fellow classmate is come t h the long run. only prices can change from any shift. O Incorrect the is only true when the AS curve is shifting O incorrect: this is only true when the AD curve is shifting O correct only a change in government policy can change both prices and output In the long nin