Pigs and camels were first domesticated in the Middle East. These animals then spread to Africa and Asia due to a mass-migration out of the Middle East. What happened that caused this migration?
A.
Disease spread through the herds nearly wiping them out.
B.
The climate dried and made farming and grazing very hard.
C.
Earthquakes and natural disasters made it too dangerous to live there.
D.
The population got too large, and the land couldn’t support them.