A population has 1000 individuals. Over a period of 1 year, 200 new individuals are born. Which equation shows how to calculate the birthrate of this population?

A. 1000 * 0.2 = 200

B. 1000 + 200 = 1200

C. 200 : 1000 = 0.2

D. 1000 : 200 = 5

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