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 a

M: I’m asked to pick up the guest speaker Bob Russel at the airport this afternoon. Do you know what he looks like?
W: Well, he’s in his sixties, he stands out, he’s bald, tall and thin and has a beard.
Q: What do we conclude from the woman’s remarks about Bob Russel?

M: Do you think that Bob is serious about Sally?
W: Well, I know this. I’ve never seen him go out so often with the same girl.
Q: What conclusion can we draw from the woman’s statement?