单选题 .  ①Like Germany, but unlike other European nations, Norway industrialized rather late in the nineteenth century. ②Compared to Germany, however, Norway has a comparatively recent history of industrially based social classes and a much longer history of rather egalitarian class relations. ③The origin of Norwegian egalitarian predates industrialism and the rise of the labor movement. ④The preindustrial economy was based largely on a small independent peasantry who combined agriculture with fishing (in the north) or with forestry (in the south). ⑤Because Norway was under foreign rule for five centuries until 1905, and because the topography is unfavorable for large estates, a strong aristocracy and landowner class did not emerge in most of Norway. ⑥There were some exceptions to this pattern, especially in the southern regions where a landowner class did exist. ⑦Norway's early social and economic history engendered egalitarianism, although, as has been pointed out by several observers, it was an equality of poverty.28.  The passage is primarily concerned with discussing the ______