Over half of the refugees seeking entrance to the united states in 2007 came from a. africa and asia b. oceania and north america c. africa and north america d. oceania and asia

Correct answer choice is :

Limiting immigration law in 1921 and 1924, joined with the Great Depression and World War II, directed to a sharp drop in new arrivals. As a conclusion, the foreign-born share regularly diminished between the 1930s and 1970s. Since 1970, the share and number of immigrants have grown quickly, essentially as a result of large-scale immigration from Latin America and Asia made probable by Congress’ abolishment of national-origin admission portions in 1965.

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.