讨论下第3题,感觉正答应该是A
全文唯一相关的定位句就是文章开头Modern cultural anthropology has its origins in, and developed in reaction to, 19th century "ethnology", which involves the organized comparison of human societies.
develop这个词,就表示两者已经有变化了。
而且这句话表明cultural anthropology是ethnology的分支,B选项正好相反