Which of the following equations correctly represents the calculation of population density?
- A$N_t+1 = N_t + [(B + I) - (D + E)]$
- B$N_t+1 = N_t + [(B + E) - (I + D)]$
- C$N_t+1 = N_t - [(B + D) - (I + E)]$
- D$N_t+1 = N_t + [(B + I) - (D + E)]$
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