Those numbers tell me that Beijing is 39 degrees north of the equator and 116 degrees east of the Prime Meridian. Plus, it tells me that Beijing, climate can be warm or cold at certain times of the year. It is in the Northern Hemisphere and the Eastern Hemisphere
The most obvious reason is that one has to pack up and go because things are not so good at home. Long ago, that probably meant that the climate had changed and made life impossible. It might have become too hot or too cold or too wet, which in turn would have affected not only quality of life but also make survival a shaky proposition. Drought, flood, and temperature changes could certainly push people to move on.
I hope that helped a little.
Answer is C because in image you can see slaves
