You Tie a Short Length of String to a Small

Multiple Choice

You tie a short length of string to a small ring and hold this ring at eye level, about a foot from your face. By focusing on the ring, you are able to make the ring swing back and forth. You are surprised by this movement. You most likely have experienced

A) autosuggestion.
B) mindfulness.
C) a physical phenomenon involving the gravitational pull of the earth.
D) a fraudulent gadget used by stage hypnotists.