The two major factors that cause changes in meaning are（ ）.

The two major factors that cause changes in meaning are（ ）.
A、historical reason and class reason
B、​historical reason and psychological reason
C、class reason and psychological reason
D、extra-linguistic factors and linguistic factors
【正确答案】：D
【题目解析】：引起词义变化的因素一般有两个，即非语言因素和语言系统内部因素。