Final answer:
The growth rate in real GDP from 2021 to 2022 is 5%.
Step-by-step explanation:
To find the real GDP growth rate, we need to calculate the percentage change in real GDP from 2021 to 2022.
Using the formula for percentage change:
Percentage change = ((New value - Old value) / Old value) x 100
Where the new value is 210 and the old value is 200, the growth rate in real GDP from 2021 to 2022 is:
Percentage change = ((210 - 200) / 200) x 100 = 5%
Therefore, the correct answer is D. 5%.