According to historians, what most likely caused human migration out of Africa into other areas of the world?

A. rising sea levels

B. extinction of large animals

C. volcanic eruptions

D. climate change

E. search for better farmland

D. climate change--this has caused a depletion of resources in Africa in particular water.

Resources especially water has depleted in Africa due to changing climate as well as pollution contaminating the little water they have. Sparse resources has caused violent fighting for power over the resources.