It goes without saying, then, that language is also a political instrument, means, and proof of power. It is the most vivid and crucial key to identity: it reveals the private identity, and connects one with, or divorces one from, the larger public, or communal identity. There have been, and are, times, and places, when to speak a certain language could be dangerous, even fatal. Or, one may speak the same language, but in such a way that one’s antecedents are revealed, or (one hopes) hidden.

从一个或多个前提推导出一个结论；然后再从这个结论推导出一个新的结论，这种结构被称为（）。

A.因果结构

B.链式结构

C.复式结构

D.中介结构