In His Book the Seven Habits of Highly Effective People

In his book the Seven Habits of Highly Effective People: Powerful Lessons in Personal Change, Stephen Covey:

A) analyzed 1,435 companies to understand why some companies reach high levels of sustained performance while other companies fail to reach greatness.
B) discussed "management by objective" (MBO) , by which a manager should be self-driven to accomplish key goals that link to organizational success.
C) focused on the strategic and organizational challenges confronting managers in multinational corporations.
D) discussed how a leader's success hinges on balancing between personal and professional effectiveness.
E) urged U.S. firms to fight their competition by refocusing their business strategies on several drivers of success: people, customers, values, culture, action, and an entrepreneurial spirit.