One Problem with Horace Kallen's Ideal of a Hyphenated,culturally Pluralistic

One problem with Horace Kallen's ideal of a hyphenated,culturally pluralistic society is that ______________.

A) it excludes whites of European descent from its "orchestra" analogy
B) it doesn't address the obstacles hindering the incorporation of nonwhites into a majority-white nation
C) it erodes our national culture by focusing on differences more than similarities
D) groups lose their identities over time and become part of an overarching American identity