Brinol and Petty (2003)conducted a Study Where They Prompted Participants

Brinol and Petty (2003) conducted a study where they prompted participants to either nod their head in agreement or shake their head in disagreement while listening to a persuasive message.They found that:

A) when the message was weak, nodding produced more persuasion than shaking.
B) when the message was strong, nodding produced more persuasion than shaking.
C) nodding produced less persuasion both when the messages were strong and when the messages were weak.
D) there was no difference in levels of persuasion between those who were nodding and those who were shaking their head.