The author is primarily concerned with A. arguing that English usage of descriptors of nationality should reflect usage within the native languages of the countries in question B. clarifying how the fall of the Persian Empire has influenced the terminology that modern citizens of Iran use to define their nationality C. distinguishing among three groups that use the same term to describe their national identities D. explaining two opposing positions in an argument about the use of a descriptor of national identity E. persuading readers that in order for the term Persian to have a clear relationship to nationality, only Iranians, not Afghanis or Pakistanis, should use the term