Which of the Following Is Rule 1 in Deming's Funnel

Multiple Choice

Which of the following is Rule 1 in Deming's Funnel Experiment?

A) Leave the funnel alone.
B) Place the funnel over the spot where the marble last comes to rest.
C) Move the funnel an equal distance in the opposite direction from its current position.
D) Set the funnel an equal distance in the opposite direction of the error from the target.