Which of the following correctly represents the phases of the demographic transition model?

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Elevated birth and death ratesDeclining death rates with sustained high birth ratesReduced birth and death ratesAll of the above

Explanation

The demographic transition model includes stages characterized by: A) high birth and death rates, B) decreasing death rates while birth rates remain high, and C) both birth and death rates being low. Therefore, all these stages are part of the model.