North American immigrants

According to the map, ① North America, ② South America, ③ Europe, ④ Africa, ⑤ Asia and ⑤ Oceania. Among them, Latin America to North America is one of the three major immigration flows, a large number of Asian immigrants flow to North America and Europe, and a large number of Asian immigrants flow to Oceania. The most populous continent is North America.

So choose: C.