Leadership Incompetence in Organizations May Be Because

Leadership incompetence in organizations may be because

A) leadership cannot be learned on the job.
B) leadership is hard to describe in a job description,so it is hard to hire leaders.
C) many managers are promoted from jobs that didn't have a leadership role,to a job that has a leadership role.
D) leaders are born,and there are too few to supply all the needs of organizations.
E) most organizations don't value leadership,so don't hire for it.