Respuesta :
C. immigration means to come to and emigration means to leave so demographers would have trouble calculating the correct population.
Answer:
c. Demographers find it difficult to make predictions about populations.
Explanation:
This is one of the complications that demographers have when it comes to immigration and emigration. Immigration and emigrations are two processes by which the population of a place can change. Due to this constant fluctuation, demographers can find it very difficult to make predictions about populations.