If the nominal gross domestic product (GDP) of the nation of Hypothetica increased in 2007 relative to the previous year, it must be true that in Hypothetica in 2007A.both the price level and the real GDP have increasedB.neither the price level nor the real GDP has increasedC.the price level increased by a larger percentage than did the real GDPD.the price level increased by a smaller percentage than did the real GDPE.the price level and/or the real GDP has increased