Below is a table about naturalization patterns.
Year Persons Naturalized in the United States
1990 267,586
2000 886,026
2010 619,913
Source: 2011 Yearbook of Immigration Studies
Based on the table, how has Congress responded to naturalization patterns in the last 20 years?
A. Incumbents running for re-election have sought natural-born citizens’ votes.
B. Incumbents running for re-election have sought immigrants’ votes.
C. Legislators have limited access to immigrants seeking citizenship.
D. Political parties have passed citizenship reform.