题型分类：简化句子题

题干分析：本题型要从长难句的内容和逻辑上进行分析。原句中有but表示转折关系，even before表示时间，as表示补充说明。我们以这些词为分界点将长难句进行拆分。Hierarchies that did not exist in earlier foraging groups说明等级制度并不存在于早期游牧社会；but that were helpful in structuring cooperative labor and in organizing more-complex technologies probably became established说等级制度对于组织劳动合作以及组织更加复杂的科技是有用的，这样的等级制度变得明确了；even before domestication and agriculture说即使是在驯化和农业发展之前；as pre-Neolithic societies (before the tenth millennium B.C.E.) reacted to the population increase说正如新石器时代前期对于人口增长所作出的反应。

选项分析：

C选项Population increases among pre-Neolithic societies，对应原句as pre-Neolithic societies (before the tenth millennium B.C.E.) reacted to the population increase, even before domestication and agriculture，与原句相同。probably resulted in social hierarchies that helped organize labor and technologies对应原句Hierarchies…but that were helpful in structuring cooperative labor and in organizing more-complex technologies probably became established。虽然选项中没有表示转折关系的标识词，但从原句分析看，句中but实际是起到强调作用，而强调部分but that were helpful in structuring cooperative labor and in organizing more-complex technologies probably在选项中有表达，所以逻辑和内容符合原句。

A选项The appearance of domestication and agriculture brought about the need…，原句中无此信息，属于无中生有。

B选项说The formation of social hierarchies meant that domestication and agriculture became less important，原句中无此信息，属于无中生有。

D选项说...later population increases caused by domestication and agriculture，原句中无此信息，属于无中生有。