Regarding Subliminal Perception, Which of the Following Statements Is/are TRUE

Multiple Choice

Regarding subliminal perception, which of the following statements is/are TRUE?

A) A subliminal message would involve the presentation of stimuli too rapidly or too weakly to be consciously recognized.
B) Subliminal messages have never been used by advertisers in an attempt to increase sales.
C) Subliminal messages on tapes have been shown to be effective in helping people lose weight and improve grades.
D) All of these statements are true.