The Valente (2010) reading mentions the five main elements of the Diffusion model. Which of the following are the elements mentioned? Group of answer choices a. Perceived characteristics of the innovation affect its rate of adoption b. Diffusion occurs over time so that rate of adoption often yields a cumulate adoption S-shaped pattern and individuals are classified as early or late adopters c. Individuals pass through stages during the adoption process typically classified as knowledge, persuasion, decision, implementation, and confirmation d. People can modify the innovation and sometimes discontinue its use e. Mathematical models can be developed to measure the rate and character of diffusion curves f. All of the above