What Role Does Management Play in Establishing the Ethical Culture

What role does management play in establishing the ethical culture of a firm?

A) The presence of ethical behavior by managers is influential to the organization's culture, but the absence of ethical behavior is not.
B) Whether managers act ethically or not has no bearing on the ethical culture of a firm's organization.
C) Only managers that deal with entities outside the firm have a responsibility to act ethically and thus impact the firm's organizational culture.
D) The presence or absence of ethical behavior in managerial actions both influences and reflects the organization's culture.