When a word is coined， it is always monosemic. But in the course of development， the same symbol must be used to express more meanings. The result is（）.

When a word is coined， it is always monosemic. But in the course of development， the same symbol must be used to express more meanings. The result is（）.
A、polysemy
B、homonymy
C、synonymy
D、antonymy
正确答案：A