Gass & Seiter's Advice on Subliminal Messages Is

Gass & Seiter's advice on subliminal messages is

A) consumers have little to fear from subliminal messages
B) as subliminal messages become increasingly more sophisticated, consumers will have more and more to fear
C) older subliminal messages were ineffective, but current subliminal techniques are highly effective
D) subliminal messages are almost always more effective than their visible or audible counterparts