The Key Idea Behind Diffusion of Innovation Is That

The key idea behind diffusion of innovation is that

A) not all consumers accept a new product at the same time; adoption of a product spreads slowly throughout the population.
B) once a product enters the market the time span between awareness and purchase is incredibly short.
C) the introduction of a entire new product class almost always diffuses the importance of its predecessor within a matter of months.
D) adoption of a new product depends almost entirely upon the introductory price, so adoption diffuses based upon consumer income.
E) the rate of adoption has an almost one-to-one correlation with the life cycle graph based on product class.