Diffusion of innovations explains rate and pattern of adoption; the product life cycle describes sales and market dynamics over a product's life.

• A. True
• B. False
• C. Only diffusion
• D. Only life cycle

Answer: (A)

Understanding how new ideas spread and how a product performs over time involves two complementary ideas. Diffusion of innovations explains how quickly and in what pattern people adopt an innovation, including who adopts first and what factors speed or slow uptake. The product life cycle maps sales and market dynamics across the product’s life—from introduction through growth, maturity, and decline—and suggests how marketing effort and competition evolve at each stage. The statement is correct because diffusion covers the rate and pattern of adoption, while the product life cycle describes sales and market dynamics over the life of the product. Together, they give a fuller view of how a product moves from launch to withdrawal.