Curtis Marean Has Proposed That the Origins of H

Curtis Marean has proposed that the origins of H.sapiens resulted from:

A) climatic changes bringing about severe drought forcing hominin populations into coastline habitats in South Africa
B) climatic changes bringing about the expansion of the Sahara desert forcing hominin populations into the lakes of the Rift valleys
C) the expansion of the Red Sea altering ocean currents bringing about changing in the distribution of marine resources along the coast of East Africa
D) a period of extreme rainfall and flooding forcing hominin populations out of the expanding rain forests into grassland and desert regions