How many generations did it take modern man to leave Africa and penetrate every corner of the globe?

See explanation section

Explanation:

Though The first Homo Sapiens were born about 200,000 years ago, the modern man left Africa 60,000 years ago to penetrate every corner of the world. It is hard to find that the distance and time of their travel. According to the anthropologist and paleontologist, the human took nearly six hundred generations to leave their African homeland to settle the world. It is also known as ‘’The great human migration’’.

Here is the source: The Genographic Project, National Geographic Smithsonian Magazine, University of Oxford.

i think that d. wind is the answer.   i missed the question when i answered a. currents.