The Immigration Rate (New Immigrants as a Proportion of the Population)

The immigration rate (new immigrants as a proportion of the population) is

A) lower than it has been throughout much of our history.
B) higher than it has ever been.
C) hard to calculate, as the number of illegal immigrants is so high.
D) quite stable as different immigrant groups enter and leave the United States.
E) less important as globalization pays for the significant number of illegal immigrants.