In the base year in a small island macroeconomy, nominal GDP was $400m. In a later year when the general level of all prices was twice as high, nominal GDP reached $1000m. Between the base year and the later year: A. Real GDP declined. B. There was real GDP growth by more than 100% C. There was real GDP growth, but by less than 100% D. Inflation occurred.

Both options C and D are correct.

Explanation:

Inflation refers to an increase in the general price level of goods and services overtime. Since it is conveyed in the question that the general price level in a later year became twice as high, inflation definitely occurred. Hence, option D is correct.

Nominal GDP is the value of the total output at current market prices. Real GDP adjusts that value for inflation. As prices double, nominal GDP ought to increase from $400m to $800m. However, it actually rose to $1000m. This additional increase of $200m shows that the real GDP has risen. However, the increase in real GDP is less than 100%. This implies option C is also correct.  

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