What Did Researchers Find When They Attempted to Implant a False

What did researchers find when they attempted to implant a false memory so strong that participants would falsely confess to having committed a criminal act of assault?

A) They were unsuccessful because the memories they tried to implant were too emotional.
B) They were successful with children but not adults.
C) They were successful,but only when participants were questioned under hypnosis.
D) They were successful for a substantial number of participants.