If Nominal National Income Increased by 10% Over a Certain

Multiple Choice

If nominal national income increased by 10% over a certain period of time while real national income increased by 20%,then

A) everybody in the economy became worse off.
B) inflation has occurred during this time period.
C) the labour force increased by 10%.
D) the price level has declined by about 10%.
E) the price level has increased by approximately 10%.