One of the major contributions of Peter Drucker was the

Multiple Choice

discovery that great companies are managed by "level$-5$ leaders" who often display h while simultaneously inspiring those in the organization to apply self$-$discipline.

focus on organizational change.

ability of U$.$S$.$ firms to fight their competition by refocusing their business strategies on s drivers of success like people and customers.

focus on the strategic and organizational challenges confronting managers in multination corporations.