Final answer:
Early humans emerged from Africa before spreading to the rest of the world. The Great Rift Valley in East Africa is believed to be the origin of human evolution.
Step-by-step explanation:
The correct answer is c) East Africa. Early humans emerged from Africa and then spread out to populate different parts of the world. It is believed that human evolution began in East Africa, specifically in the region known as the Great Rift Valley. From there, early humans migrated to other regions, eventually populating the entire globe. This is supported by scientific research and evidence.