To Break Through the Glass Ceiling into Senior Management Roles

To break through the glass ceiling into senior management roles, top executives suggest female managers should:

A) work at as many jobs as they can early in their careers to gain as much experience as possible.
B) display nonverbal messages such as tilting the head when listening and smiling excessively when communicating.
C) be assertive and ask for what they want.
D) downplay their accomplishments and insights.
E) all of these.