True or false there was a system of national courts

How did european immigrants of the late 1800s change american society

In the years after world war ii, which of the following caused many people from asian and african countries to migrate to europe? a. the end of the soviet union b. new economic opportunities after colonialism ended c. the religious freedom found in europe d. new laws allowing greater numbers of immigrants into european countries

Acurb of this color means you may not stop a) yellow b)green c) red d) blue