问大家Tpo14一个阅读的问题

sd1053774UID: 2749829

第三篇的第十题
文中说：
Inequalities of wealth and rank certainly exist, and have probably existed in most pastoralist societies, but except in periods of military conquest, they are normally too slight to generate the stable, hereditary hierarchies that are usually implied by the use of the term class.

问题是问
According to the paragraph, all of the following are true of social inequality in pastoralist societies EXCEPT:
1. right
2. It is most marked during periods of military conquest
3. It is expressed in the form of a rigid hierarchy based largely on heredity
4. right

我知道第三个是错误的
但是请问第二个怎么就对了？

sd1053774UID: 2749829

正确答案是3，但是我觉得2说的也不对啊。
文中不是说了“except in periods of military conquest” 么？为什么答案2不选呢？
难道题出错了？