What are the four components of population change? Summarize them mathematically.
A) Births, deaths, immigration, emigration (P = B + D + I - E)
B) Births, deaths, population density, migration (P = B + D + PD - M)
C) Births, deaths, population growth rate, urbanization (P = B + D + G - U)
D) Births, deaths, life expectancy, population distribution (P = B + D + LE - PD)
