Which Statement Concerning the Impact of Body Movements on Persuasion

Which statement concerning the impact of body movements on persuasion is true?

A) People who nod their heads up and down express greater agreement with a persuasive message than those who shake their heads side to side.
B) Stimuli associated with stretching the arms outward are rated more positively than those associated with flexing the arms inward.
C) Nodding the head side to side makes people more likely to engage in central route processing than does nodding the head up and down.
D) Stretching the arms outward makes people less likely to engage in central route processing than does flexing the arms inward.