8. Tom did a study to economic growth in a Nordic country between 2010 and 2020. Using 2010 as the base year, he calculated a 16% increase for real GDP and a 12% increase for nominal GDP. His results indicate that ____.

A. Tom needs more information to calculate nominal GDP.

B. the quantity of outputs produced decreased over the period.

C. the quantity of outputs produced did not change and prices decreased over the period.

D. the quantity of outputs produced and prices both decreased over the period.

E. the quantity of outputs increased and prices decreased over the period.