The word manuscript used to mean “handwriting”,but now it means “any author's writing whether written by hand or typed with a typewriter or a word-processor”. This is an example of____of meaning.

The word manuscript used to mean “handwriting”,but now it means “any author's writing whether written by hand or typed with a typewriter or a word-processor”. This is an example of____of meaning.

A.extension

B.narrowing

C.degradation

D.elevation

正确答案是A