The Shapes of the Product Life Cycle for High-Learning, Low-Learning

The shapes of the product life cycle for high-learning, low-learning, fashion, and fad products vary as does

A) the actual length of time a product stays in any stage of the life cycle.
B) the individual criteria selected to place a firm in a stage of the life cycle.
C) the importance of the marketing mix elements.
D) the importance of environmental forces.
E) the importance of new product innovation.