Human Geo Unit 3 test

Today we had our test. I studied a lot for it and I think it actually paid off. The only question that I had a little bit of confusion on was one of the bonus questions. It was the question that asked about the net migration of the world. If I remember correctly I put zero and I have no clue if its right or not but I really hope it is. Quite honestly I think I did good on the test but then again every time I say that I do bad. Therefore I really hope I got the bonus question right so that I can get an extra 2 points.