The key idea behind diffusion of innovation is that

Multiple Choice

adoption of a new product line does not change the diffusion rate of older lines in the market.

the introduction of an entire new product class almost always diffuses the importance of its predecessor within a matter of months.

the rate of adoption is independent of other product form innovations or competitive products in the marketplace.

once a product enters the market, the time span between awareness and purchase is incredibly short.

not all consumers accept a new product at the same time; adoption of a product spreads slowly throughout the population.