题目解析:
第3段高亮句主干信息:the term "structural functionalism" is often used to describe his approach.
A选项主干信息the analysis improved approach,与原文主干信息不符,错误;
B选项主干信息The term “structural functionalism” is used for Radcliffe-Brown's view = the term "structural functionalism" is often used to describe his approach,that the function of rules, practices, and customs is to maintain social structure = the social structure as the system to be maintained through the development of supporting rules, practices, and customs,正确;
C选项主干信息version supports the development,与原文主干信息不符,错误;
D选项主干信息rules, practices and customs are features,与原文主干信息不符,错误。
故选B。