Man: Do you think that Bob is serious about Sally?Woman: Well, I know this. I've never see
Man: Do you think that Bob is serious about Sally?
Woman: Well, I know this. I've never seen him go out so often with the same girl.
Question: What conclusion can we draw from the woman's statement?
A.Bob is serious about Sally.
B.Bob never goes steady with a girl.
C.Bob will soon change his girlfriend.
D.Bob is not serious about Sally.