Barry Held a Ring Attached to a String at Eye

Multiple Choice

Barry held a ring attached to a string at eye level and concentrated on the ring. He is surprised that the ring begins to move and that he appears to be making it move using only mental force. Barry has shown all of the following EXCEPT

A) autosuggestion.
B) introspective awareness.
C) tiny micromovements of the hand.
D) involuntary actions resulting from self-hypnosis.