多选题 National character is not formally considered by social scientists in discussing economic and social development today. They believe that people differ and that these differences should be taken into account somehow, but they have as yet discovered no way to include such variables in their formal models of economic and social development. The difficulty ties in the nature of the data that supposedly define different national characters. Anthropologists and others are on much firmer ground when they attempt to describe the cultural norms for a small homogeneous tribe or village than when they undertake the formidable task of discovering the {{U}}norms that exist in a complex modem nation-state composed of many disparate groups{{/U}}. The situation is further complicated by the nature of judgments about character, since such judgments are overly dependent on impressions and since, furthermore, impressions are usually stated in qualitative terms, it is impossible to make a reliable comparison between the national characters of two countries.
According to the passage, which of the following is NOT true of modem nation-states?

• A. They are complex.
• B. They are heterogeneous.
• C. They are of interest to social scientists.
• D. They lack cultural norms.
• E. They differ from one another in terms of national character.