Answer:
<u>S</u><u>peculation</u><u> is</u><u> </u><u>not</u><u> </u><u>a</u><u> </u><u>tool that</u><u> </u><u>helps</u><u> </u><u>you</u><u> </u><u>think</u><u> </u><u>as</u><u> </u><u>a</u><u> </u><u>geographer</u><u>.</u>
Very easy gravity is strong from the universe.
I am not completely sure, but I think it might be B, Migration out of a stage 3 or 4 country is higher than migration to it.