How Are Ethics a Part of Leadership

How are ethics a part of leadership?

A) Transactional leaders have been described as fostering moral virtue when they try to change the attitudes and behaviors of followers.
B) Trust explicitly deals with the leadership traits of honesty and integrity.
C) Unethical leaders may use their charisma in more socially constructive ways to serve others.
D) Ethics are used when leaders give themselves large salaries while they lay off employees.