Which scenario illustrates the principle of consistency? a. patti mentions several examples of other people volunteering at her charity to influence her readers. b. marc stresses that the company anti-litter campaign occurs only once a year. c. maribeth describes how that local cancer center has several colleagues, which is why the company supports it. d. bill names several high-profile celebrities who support the same charity event that the company is sponsoring. e. maya asks volunteers to sign up by return email because then they will be more likely to carry through.