A mathematical model predicts that the population of a country, million, will be given by the formula , where is the number of years since 2015. Use this model to predict the population of the country, to the nearest million, in both 2021 and 2022.
- A18 million, 19 million
- B18 million, 20 million
- C19 million, 20 million
- D19 million, 21 million
- E18 million, 21 million
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