Which of the following could best be used as evidence to support the argument in the excerpt that “ethnic conflict among whites rivaled sectional conflict as a major
political issue" of the period?
A. Growing concern about the political and cultural influence of Catholic
immigrants
B. Growing fear of political radicalism among southern and eastern European
immigrants
C. Increasing cultural influence of European Romanticism in the United States
D. Increasing support for the antislavery cause among the immigrant
community