A study purportedly conducted by James Vicary teaches us what about the power of subliminal perception and its effect on advertising?
a. Subliminal advertising can profoundly affect a consumer's decision-making process.
b. Subliminal advertising affects a consumer's decision-making process but only when it involves comfort foods such as popcorn and soda.
c. Subliminal advertising is effective on those who believe in the power of the unconscious.
d. Subliminal advertising was never supported, since Vicary ultimately admitted that he never truly conducted such a study.