The Most Powerful of the Five Competitive Forces Is Usually

The most powerful of the five competitive forces is usually

A) the competitive pressures that stem from the ready availability of attractively-priced substitute products.
B) the competitive pressures associated with the market maneuvering and jockeying for buyer patronage that goes on among rival sellers in the industry.
C) the benefits that emerge from close collaboration with suppliers and the competitive pressures that such collaboration creates.
D) the competitive pressures associated with the potential entry of new competitors.
E) the bargaining power and leverage that large customers are able to exercise.