Among the Western Nations the United States Is Considered to Be

Among the Western nations the United States is considered to be the most religious. The reason for this religiosity, according to researchers, are all of the following EXCEPT

A) the population is more diverse than other Western nations.
B) Americans use religion to distinguish themselves from other members of other groups.
C) Americans have suffered great adversity and seek solace in religion.
D) the insurgence of immigrants from third world countries.