The term "vocabulary" is used in different ways because of all the following reasons except that（）.

The term "vocabulary" is used in different ways because of all the following reasons except that（）.

A.it can refer to the common core of a language

B.it can refer to the total number of the words in a language

C.it can represent all the words used in a certain historical period

D.it can stand for words in given dialect or field

正确答案是A