Which of the Following Is a Possible Explanation for the United

Which of the following is a possible explanation for the United States' demographic trends?

A) The United States has a relatively high rate of immigration.
B) Many immigrants who come to the United States come from countries whose cultures encourage larger families.
C) Many immigrants come to the United States from countries that discourage birth control.
D) Women in the United States give birth to more than two children on average, which is much higher than other MDCs.
E) All of the above