In order to have greater control over image and avoid problems that can occur for misbehavior of celebrities, companies have used _____________________ in their advertisements, like "Flo" for Progressive Insurance, "Tony the Tiger" for Kellogg's Frosted Flakes, and the Geiko Gecko.
a. Cohorts
b. Q factors
c. Safe marketing
d. Spokescharacters
e. Stealth marketing