The word “journal” originally meant mere “daily paper”，but now has come to include any “periodical”. The above example reflects one type of changes in word meaning,that is，____.

The word “journal” originally meant mere “daily paper”，but now has come to include any “periodical”. The above example reflects one type of changes in word meaning,that is，____.

A.extension

B.narrowing

C.degradation

D.elevation

正确答案是A