【单选题】

Man: We’ve got three women researchers in our group: Mary,Betty and Helen.Do you know them

Woman: Sure. Mary is active and sociable.Betty is the most talkative woman I’ve ever met.But guess what Helen’s just the opposite.
Question: What do we learn from the woman’s remark about Helen
A．Helen is talkative.
B．Helen is active.
C．Helen is sociable.
D．Helen is quiet.