Over the last twenty years, real GDP in the U.S. economy has increased

Over the last twenty years, real GDP in the U.S. economy has increased and there has been inflation. This indicates that

A) aggregate demand has been constant while aggregate supply has increased.
B) aggregate demand has increased more than aggregate supply.
C) aggregate demand has increased while aggregate supply has been constant.
D) aggregate demand has increased less than aggregate supply.

ANSWER

B