The passage suggests that the author would be likely to agree with which of the following
The passage suggests that the author would be likely to agree with which of the following statements about the social structure of eighteenth-century American society？Ⅰ. It allowed greater economic opportunity than it did social mobility.Ⅱ. It permitted greater economic opportunity prior to 1750 than after 1750.Ⅲ. It did not contain rigidly defined socioeconomic divisions.Ⅳ. It prevented economic disputes from arising among members of the society.
A．Ⅰ and Ⅳ only
B．Ⅱ and Ⅲ only
C．Ⅲ and Ⅳ only
D．Ⅰ, Ⅱ, and Ⅲ only
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正确答案：B
解析：该提问：本文暗示，关于七、八世纪美国社会结构的描述，作者将同意哪种观点? Ⅰ．与社会流动性相比，它允许更多的经济社会。在本文中扦没有此比较。
Ⅱ．与1750年以后相比，1750年之前它允许更多的经济社会。这在本文的第一段中可以找到线索though recent statistic suggest a narrowing of economic opportunity as the latter half of the century progressed意为“尽管最近的统计数据表是，18世纪后期经济机会趋于减少”。因此可知Ⅱ为正确的。
Ⅲ．它不包括严格定义的社会经济划分。在本文的第一段中可以找到线索that to talk about social classes at all re quires the use of loose economic categories such as rich，poor，and middle class，or eighteenth-century designations like the better sort意为“以致于在讨沦社会阶段时，需要使用——些较含糊的经济范畴，如富人、穷人和中间阶段，或者用18世纪的‘较好的阶级’这类名称”。因此可知Ⅲ为正确的。
Ⅳ它阻止了社会成员之间经济纠纷的发生。在本文的第一段中有线索usually prevented such disputes from hardening along class lines意为“通常使这些争执不至于在阶级路线上僵硬地发展下去”。这说的是阻止恶化，而不是阻止产生。因此不正确。因此比较A、B、C、D四项，B项为正确选项。