Year Alta (Real GDP) Zorn (Real GDP) Alta (Population) Zorn (Population)
1 $2,000 $150,000 200 500
2 2100 $152,000 202 505
3 2200 $154,000 210 508

Between years 2 and 3 :

a. population fell in Alta.
b. Alta's real GDP grew more rapidly than Zorn's real GDP.
c. real GDP fell in Zorn.
d. population growth reduced Alta's real GDP growth to zero.