Olga and Her Children Are Currently Undocumented but Her Sister

Olga and her children are currently undocumented but her sister and brother-in-law are documented immigrants in the United States. Olga's newborn child is a U.S. citizen with an undocumented parent and undocumented siblings. What aspect of the immigrant experience does this exemplify?

A) that the United States does not adequately enforce migration law
B) that migration for family reunification is common
C) that many immigrant families are mixed status families
D) that women frequently overstay their visas because of family connections