How Have Psychologists Applied Hypnotic Hallucinations to Control Pain? Have

How have psychologists applied hypnotic hallucinations to control pain? Have these efforts been successful?

A) Positive hallucinations have been used to focus the individual on pleasant objects or events. These efforts have been successful.
B) Positive hallucinations have been used to focus the individual on pleasant objects or events. Overall, these efforts have not been successful.
C) Negative hallucinations have been used to direct the individual to ignore the pain. These efforts have been successful.
D) Negative hallucinations have been used to direct the individual to ignore the pain. Overall, these efforts have not been successful.