The correct answer is false.
It is false that Kotter studied a number of successful general managers over a five-year period and found that they spend most of their time by themselves drawing up plans or worrying about important decisions
Philip Kottler has been considered to be a guru in management and marketing. He has spent many hours, days, and tears studying management styles, functions, and leadership in a considerable number of organizations and has realized the most important characteristics of a top management leader and modern marketing techniques in corporations.
His reconditions, written in some important and renowned books have become a "must-have" guide for modern leaders in the corporate world.