I am not completely sure, but I think it might be B, Migration out of a stage 3 or 4 country is higher than migration to it.
A. Japan
The war in the Pacific ended when Japan surrendered on September 2, 1945.
Answer: b
Explanation: temperate climates with adequate rainfall
The construction and operation of dams in the Colorado River have multiple benefits that include having increased water for irrigation and domestic supply, generation of hydroelectric power energy, providing improved aquatic recreation and wildlife habitat, and flood control.