Innovative Product Ideas Reach Markets with Varying Rates of Diffusion

Innovative product ideas reach markets with varying rates of diffusion based on the time variable. All of the following are actual examples of this phenomenon EXCEPT:

A) microwave ovens took 20 years to catch on in the United States.
B) the contraceptive pill took only a few years to be accepted in the United States.
C) modern math took only about five years to be diffused through the U.S. school systems.
D) the idea of kindergartens took nearly 50 years to gain total acceptance in the United States.
E) color televisions were available in 1949 but not widely accepted in the market until 1985.