Which of the following is NOT one respect of the rhetorical feat

Which of the following is NOT one respect of the rhetorical features of idioms?（ ）
A、Phonetic manipulation.
B、Lexical manipulation.
C、Syntactical manipulation.
D、Figures of speech.
【正确答案】：C
【题目解析】：习语的特征由对习语不同的特征的认识可知该题选C。