Answer:
B. stage 2
Explanation:
The "Demographic Transition" is a model illustrates the  population change over a given period of time. The migration transition model predicts that high international emigration and interregional rural-to-urban migration reaches a peak at stage 2 of the demographic transition. During which there is a large increase in emigration which begins to slow down in stage 3 , thus indicating that a peak has been reached.
