The structural stability of idioms is reflected in the following aspects EXCEPT（ ）.

The structural stability of idioms is reflected in the following aspects EXCEPT（ ）.

A.the constituents of idioms cannot be replaced​

B.the word order cannot be inverted or changed

C.the various words that make up the idioms have lost their individual identity

D.the constituents of an idiom cannot be deleted or added to, not even an article

正确答案是C