When we greet somebody , we should pay attention to the addressing form, which of the following is the correct way to address a lady whom you are not sure whether she is married or not?（）

When we greet somebody , we should pay attention to the addressing form, which of the following is the correct way to address a lady whom you are not sure whether she is married or not?（）
A.Mr. Smith
B.Miss Smith
C.Ms. Smith
D.Mrs. Smith
正确答案：Ms. Smith