Why does the president sign with multiple pens?

In order to accurately determine absolute time, you need to know which of the following?

Which of the following are ways that people in democracies can take part in politics and gonverments

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