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) Subliminal self-help tapes have been shown to have no effect, even when the person wanted to be influenced.
B) People who think they have been helped by subliminal messages have likely experienced nothing more than a placebo effect.
C) Only simple messages, such as single words, can be processed subliminally.
D) All of these statements are true.