2. PART B: Which detail from the text best supports
 the answer to Part A?
 A "Sometimes, though, people have more urgent
 reasons to leave their home countries." (
 Paragraph 2)
 B "In just a few years after the discovery of gold,
 about 150,000 Chinese people immigrated to
 the United States." ( Paragraph 4)
 C "Over the years, countries have used laws, both
 fairly and unfairly, to control immigration.” (
 Paragraph 6)
 D "One reason for the global growth of
 immigration is the improvement of
 transportation and the decrease in cost." (
 Paragraph 8)