Figure 291, Immigrant Growth by Home Region, 1971-2000, Shows Various Immigration

Figure 29.1, Immigrant Growth by Home Region, 1971-2000, shows various immigration trends for the time period. Which of the following statements about late-twentieth-century immigration are correct?

A) African immigration remained mostly illegal.
B) European immigration varied depending on the American business cycle.
C) South American immigration fluctuated widely, depending on the political regimes there.
D) The majority of immigrants to the U.S. during this era were from North America.