Which of the Following Statements Is True About Illegal Immigration

Which of the following statements is true about illegal immigration?

A) Illegal immigrants are often willing to work for less pay, keeping costs and prices for consumer goods and services lower.
B) Illegal immigration reduces wages for U.S. workers who are complementary inputs.
C) Illegal immigration tends to reduce wages less for previous immigrants than for native-born workers.
D) All of the other answers are correct.